Sandbox

SELECT 
  SQL_CALC_FOUND_ROWS products.product_id, 
  descr1.product as product, 
  companies.company as company_name, 
  companies.ec_rfq_whatsapp_number, 
  companies.ec_rfq_bht, 
  companies.ec_rfq_phone_number, 
  companies.ec_rfq_bhf, 
  products.product_type, 
  products.parent_product_id, 
  cscart_ec_table_booking_system.booking_type as booking_type 
FROM 
  cscart_products as products 
  LEFT JOIN cscart_product_descriptions as descr1 ON descr1.product_id = products.product_id 
  AND descr1.lang_code = 'en' 
  LEFT JOIN cscart_product_prices as prices ON prices.product_id = products.product_id 
  AND prices.lower_limit = 1 
  LEFT JOIN cscart_companies AS companies ON companies.company_id = products.company_id 
  INNER JOIN cscart_products_categories as products_categories ON products_categories.product_id = products.product_id 
  INNER JOIN cscart_categories ON cscart_categories.category_id = products_categories.category_id 
  AND (
    cscart_categories.usergroup_ids = '' 
    OR FIND_IN_SET(
      0, cscart_categories.usergroup_ids
    ) 
    OR FIND_IN_SET(
      1, cscart_categories.usergroup_ids
    )
  ) 
  AND cscart_categories.status IN ('A', 'H') 
  AND cscart_categories.storefront_id IN (0, 1) 
  LEFT JOIN cscart_ec_table_booking_system ON cscart_ec_table_booking_system.product_id = products.product_id 
  LEFT JOIN cscart_product_popularity as popularity ON popularity.product_id = products.product_id 
WHERE 
  1 
  AND cscart_categories.category_id IN (
    4001, 
    4003, 
    4004, 
    4239, 
    4259, 
    4278, 
    4294, 
    4302, 
    4311, 
    4327, 
    4336, 
    4343, 
    4361, 
    4375, 
    4392, 
    4417, 
    4437, 
    4459, 
    4479, 
    4518, 
    4539, 
    4556, 
    4572, 
    4590, 
    4608, 
    4633, 
    9285, 
    9292, 
    9634, 
    4257, 
    4308, 
    4331, 
    4351, 
    4386, 
    4418, 
    4442, 
    4480, 
    4499, 
    4519, 
    4650, 
    4684, 
    4763, 
    4781, 
    9293, 
    4833, 
    4854, 
    4873, 
    4895, 
    4920, 
    4943, 
    4301, 
    4339, 
    4357, 
    4383, 
    4389, 
    4457, 
    4275, 
    4300, 
    4324, 
    4350, 
    4385, 
    4288, 
    4563, 
    4598, 
    4655, 
    4695, 
    4730, 
    4788, 
    4822, 
    4849, 
    4871, 
    4896, 
    4951, 
    4994, 
    5034, 
    5072, 
    4289, 
    4304, 
    4334, 
    10182, 
    10183, 
    4373, 
    4754, 
    4773, 
    4786, 
    4807, 
    4820, 
    4834, 
    4848, 
    4866, 
    4884, 
    4903, 
    5088, 
    5173, 
    5197, 
    4933, 
    5215, 
    5231, 
    5244, 
    5256, 
    5270, 
    5282, 
    4987, 
    5298, 
    5312, 
    5320, 
    4365, 
    4422, 
    4423, 
    5635, 
    5657, 
    4458, 
    4886, 
    4931, 
    4949, 
    4991, 
    5012, 
    5038, 
    5105, 
    5130, 
    5153, 
    5178, 
    5203, 
    4468, 
    4472, 
    4501, 
    4504, 
    4525, 
    4399, 
    4272, 
    4571, 
    4622, 
    4644, 
    4669, 
    4798, 
    4816, 
    9682, 
    9684, 
    9685, 
    9686, 
    7811, 
    9016, 
    9681, 
    9687, 
    9688, 
    9689, 
    9690, 
    4551, 
    10177, 
    10178, 
    10179, 
    10180, 
    10181, 
    4588, 
    4617, 
    4648, 
    4746, 
    4774, 
    4795, 
    4813, 
    4842, 
    4864, 
    4875, 
    9639, 
    9825, 
    4638, 
    4667, 
    4693, 
    4717, 
    4476, 
    4880, 
    4900, 
    4935, 
    4970, 
    5011, 
    5064, 
    5101, 
    5133, 
    5163, 
    5186, 
    5220, 
    5243, 
    4791, 
    10258, 
    4827, 
    4867, 
    4914, 
    4961, 
    5092, 
    5136, 
    5168, 
    5228, 
    5264, 
    4299, 
    5302, 
    5318, 
    5342, 
    5358, 
    5378, 
    5400, 
    5418, 
    5443, 
    9018, 
    4832, 
    4857, 
    10171, 
    10630, 
    4882, 
    5218, 
    5238, 
    5255, 
    5268, 
    5280, 
    5292, 
    5303, 
    5315, 
    5332, 
    5346, 
    5322, 
    5477, 
    5531, 
    5366, 
    5401, 
    5438, 
    5472, 
    5404, 
    5416, 
    5427, 
    5445, 
    5454, 
    5485, 
    4904, 
    5016, 
    10147, 
    5041, 
    5065, 
    5091, 
    5119, 
    5141, 
    5176, 
    5415, 
    5434, 
    5459, 
    5205, 
    5227, 
    5249, 
    5263, 
    5281, 
    5296, 
    5257, 
    5275, 
    5353, 
    5297, 
    5308, 
    5321, 
    5343, 
    5351, 
    5376, 
    5398, 
    5432, 
    5458, 
    4544, 
    4618, 
    4672, 
    4699, 
    4735, 
    4757, 
    4784, 
    4817, 
    4841, 
    4865, 
    4888, 
    4916, 
    4947, 
    4977, 
    4995, 
    5058, 
    5214, 
    4507, 
    4534, 
    5234, 
    5260, 
    5278, 
    9284, 
    10148, 
    9291, 
    4254, 
    4268, 
    4282, 
    9010, 
    4286, 
    4431, 
    4653, 
    4687, 
    4736, 
    4778, 
    4812, 
    4844, 
    4883, 
    5861, 
    5893, 
    5922, 
    5951, 
    5968, 
    5998, 
    4475, 
    4510, 
    4561, 
    4587, 
    4924, 
    4976, 
    5015, 
    5047, 
    5124, 
    5156, 
    5183, 
    5216, 
    5247, 
    4765, 
    4808, 
    5359, 
    5397, 
    5462, 
    5524, 
    9012, 
    5553, 
    5789, 
    5597, 
    4859, 
    4915, 
    4974, 
    5022, 
    5068, 
    5110, 
    5171, 
    5206, 
    5224, 
    5245, 
    5267, 
    5285, 
    5272, 
    5290, 
    5305, 
    5326, 
    5345, 
    5363, 
    5385, 
    5307, 
    5324, 
    5375, 
    5406, 
    5430, 
    5451, 
    5468, 
    5496, 
    5503, 
    5527, 
    5516, 
    5589, 
    5688, 
    5961, 
    5546, 
    6022, 
    6054, 
    6115, 
    6164, 
    6233, 
    6309, 
    7184, 
    7199, 
    7213, 
    7270, 
    7017, 
    7045, 
    7067, 
    7103, 
    4315, 
    4332, 
    4347, 
    4372, 
    4404, 
    4429, 
    9403, 
    9987, 
    10134, 
    10135, 
    10136, 
    10137, 
    10138, 
    10139, 
    10140, 
    10141, 
    10142, 
    10144, 
    10143, 
    10145, 
    10146, 
    9988, 
    9989
  ) 
  AND companies.status IN ('A') 
  AND products.company_id IN (
    1, 
    25, 
    34, 
    35, 
    36, 
    37, 
    38, 
    39, 
    40, 
    41, 
    42, 
    43, 
    44, 
    45, 
    46, 
    47, 
    48, 
    49, 
    50, 
    51, 
    52, 
    53, 
    54, 
    55, 
    56, 
    57, 
    58, 
    59, 
    60, 
    61, 
    62, 
    63, 
    64, 
    65, 
    66, 
    67, 
    68, 
    69, 
    70, 
    71, 
    72, 
    73, 
    74, 
    75, 
    76, 
    77, 
    78, 
    79, 
    81, 
    82, 
    83, 
    84, 
    85, 
    86, 
    87, 
    88, 
    89, 
    90, 
    91, 
    92, 
    93, 
    94, 
    95, 
    96, 
    97, 
    98, 
    99, 
    100, 
    101, 
    102, 
    103, 
    104, 
    105, 
    106, 
    108, 
    109, 
    110, 
    111, 
    122, 
    123, 
    124, 
    125, 
    126, 
    127, 
    128, 
    129, 
    130, 
    131, 
    132, 
    134, 
    135, 
    136, 
    137, 
    138, 
    139, 
    140, 
    141, 
    142, 
    143, 
    144, 
    145, 
    146, 
    148, 
    150, 
    152, 
    153, 
    154, 
    155, 
    156, 
    157, 
    158, 
    159, 
    160, 
    161, 
    162, 
    163, 
    164, 
    165, 
    166, 
    167, 
    168, 
    169, 
    170, 
    171, 
    172, 
    173, 
    174, 
    175, 
    176, 
    177, 
    178, 
    179, 
    180, 
    181, 
    182, 
    183, 
    184, 
    185, 
    186, 
    187, 
    188, 
    189, 
    190, 
    191, 
    192, 
    193, 
    194, 
    196, 
    197, 
    198, 
    199, 
    200, 
    202, 
    203, 
    204, 
    205, 
    206, 
    207, 
    208, 
    210, 
    211, 
    212, 
    213, 
    214, 
    215, 
    216, 
    217, 
    218, 
    219, 
    220, 
    221, 
    222, 
    223, 
    224, 
    225, 
    226, 
    227, 
    228, 
    229, 
    230, 
    231, 
    232, 
    233, 
    234, 
    235, 
    236, 
    237, 
    238, 
    239, 
    240, 
    241, 
    242, 
    243, 
    244, 
    245, 
    246, 
    247, 
    248, 
    249, 
    250, 
    251, 
    252, 
    253, 
    254, 
    255, 
    256, 
    257, 
    259, 
    260, 
    261, 
    262, 
    263, 
    264, 
    266, 
    268, 
    269, 
    271, 
    272, 
    273, 
    276, 
    277, 
    278, 
    279, 
    280, 
    281, 
    282, 
    284, 
    285, 
    286, 
    287, 
    288, 
    289, 
    290, 
    291, 
    292, 
    293, 
    294, 
    295, 
    296, 
    297, 
    298, 
    299, 
    300, 
    301, 
    302, 
    303, 
    304, 
    305, 
    306, 
    307, 
    308, 
    309, 
    310, 
    311, 
    312, 
    313, 
    314, 
    315, 
    316, 
    317, 
    318, 
    319, 
    321, 
    322, 
    323, 
    324, 
    325, 
    326, 
    327, 
    328, 
    329, 
    330, 
    331, 
    332, 
    333, 
    334, 
    335, 
    336, 
    337, 
    338, 
    339, 
    340, 
    341, 
    342, 
    343, 
    344, 
    345, 
    346, 
    347, 
    348, 
    349, 
    350, 
    351, 
    352, 
    353, 
    354, 
    355, 
    356, 
    357, 
    358, 
    359, 
    360, 
    361, 
    362, 
    363, 
    364, 
    365, 
    366, 
    367, 
    368, 
    369, 
    370, 
    371, 
    372, 
    373, 
    374, 
    377, 
    378, 
    379, 
    380, 
    381, 
    382, 
    383, 
    384, 
    385, 
    387, 
    388, 
    389, 
    391, 
    392, 
    393, 
    394, 
    395, 
    396, 
    397, 
    398, 
    400, 
    401, 
    402, 
    403, 
    404, 
    405, 
    406, 
    407, 
    408, 
    409, 
    410, 
    411, 
    414, 
    415, 
    416, 
    417, 
    418, 
    419, 
    420, 
    421, 
    422, 
    423, 
    424, 
    425, 
    426, 
    427, 
    428, 
    429, 
    430, 
    431, 
    432, 
    433, 
    434, 
    435, 
    436, 
    439, 
    440, 
    443, 
    445, 
    447, 
    448, 
    449, 
    450, 
    451, 
    452, 
    454, 
    455, 
    457, 
    458, 
    459, 
    460, 
    461, 
    462, 
    463, 
    465, 
    466, 
    467, 
    468, 
    469, 
    470, 
    471, 
    472, 
    473, 
    474, 
    476, 
    478, 
    479, 
    480, 
    481, 
    482, 
    483, 
    484, 
    485, 
    486, 
    487, 
    488, 
    489, 
    491, 
    492, 
    493, 
    494, 
    495, 
    496, 
    497, 
    498, 
    501, 
    503, 
    504, 
    505, 
    507, 
    508, 
    509, 
    510, 
    511, 
    512, 
    513, 
    514, 
    515, 
    516, 
    518, 
    519, 
    520, 
    522, 
    524, 
    525, 
    526, 
    527, 
    528, 
    531, 
    532, 
    533, 
    535, 
    537, 
    539, 
    540, 
    541, 
    542, 
    543, 
    545, 
    546, 
    547, 
    548, 
    549, 
    550, 
    551, 
    553, 
    554, 
    556, 
    557, 
    558, 
    559, 
    560, 
    561, 
    562, 
    563, 
    564, 
    566, 
    567, 
    568, 
    569, 
    575, 
    576, 
    577, 
    579, 
    580, 
    582, 
    583, 
    585, 
    586, 
    587, 
    588, 
    590, 
    591, 
    592, 
    593, 
    594, 
    595, 
    596, 
    597, 
    598, 
    600, 
    602, 
    603, 
    604, 
    606, 
    607, 
    609, 
    610, 
    611, 
    613, 
    618, 
    620, 
    621, 
    622, 
    623, 
    624, 
    625, 
    626, 
    627, 
    628, 
    629, 
    630, 
    631, 
    632, 
    633, 
    634, 
    635, 
    636, 
    637, 
    639, 
    641, 
    642, 
    643, 
    644, 
    646, 
    647, 
    649, 
    655, 
    660, 
    661, 
    662, 
    663, 
    665, 
    668, 
    669, 
    670, 
    671, 
    672, 
    673, 
    674, 
    675, 
    676, 
    678, 
    679, 
    680, 
    681, 
    682, 
    685, 
    686, 
    687, 
    688, 
    689, 
    690, 
    691, 
    692, 
    693, 
    694, 
    695, 
    696, 
    697, 
    707, 
    719, 
    0
  ) 
  AND products.company_id = 174 
  AND (
    products.usergroup_ids = '' 
    OR FIND_IN_SET(0, products.usergroup_ids) 
    OR FIND_IN_SET(1, products.usergroup_ids)
  ) 
  AND products.status IN ('A') 
  AND prices.usergroup_id IN (0, 0, 1) 
  AND products.company_id = 174 
  AND products.parent_product_id = 0 
GROUP BY 
  products.product_id 
ORDER BY 
  popularity.total desc, 
  products.product_id ASC 
LIMIT 
  0, 100

Query time 0.05164

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "5019.92"
    },
    "ordering_operation": {
      "using_filesort": true,
      "grouping_operation": {
        "using_temporary_table": true,
        "using_filesort": false,
        "nested_loop": [
          {
            "table": {
              "table_name": "companies",
              "access_type": "const",
              "possible_keys": [
                "PRIMARY"
              ],
              "key": "PRIMARY",
              "used_key_parts": [
                "company_id"
              ],
              "key_length": "4",
              "ref": [
                "const"
              ],
              "rows_examined_per_scan": 1,
              "rows_produced_per_join": 1,
              "filtered": "100.00",
              "cost_info": {
                "read_cost": "0.00",
                "eval_cost": "0.20",
                "prefix_cost": "0.00",
                "data_read_per_join": "9K"
              },
              "used_columns": [
                "company_id",
                "status",
                "company",
                "ec_rfq_whatsapp_number",
                "ec_rfq_phone_number",
                "ec_rfq_bhf",
                "ec_rfq_bht"
              ]
            }
          },
          {
            "table": {
              "table_name": "cscart_categories",
              "access_type": "range",
              "possible_keys": [
                "PRIMARY",
                "c_status",
                "p_category_id"
              ],
              "key": "PRIMARY",
              "used_key_parts": [
                "category_id"
              ],
              "key_length": "3",
              "rows_examined_per_scan": 399,
              "rows_produced_per_join": 15,
              "filtered": "4.00",
              "cost_info": {
                "read_cost": "557.16",
                "eval_cost": "3.19",
                "prefix_cost": "560.36",
                "data_read_per_join": "94K"
              },
              "used_columns": [
                "category_id",
                "usergroup_ids",
                "status",
                "storefront_id"
              ],
              "attached_condition": "((`webmarco`.`cscart_categories`.`category_id` in (4001,4003,4004,4239,4259,4278,4294,4302,4311,4327,4336,4343,4361,4375,4392,4417,4437,4459,4479,4518,4539,4556,4572,4590,4608,4633,9285,9292,9634,4257,4308,4331,4351,4386,4418,4442,4480,4499,4519,4650,4684,4763,4781,9293,4833,4854,4873,4895,4920,4943,4301,4339,4357,4383,4389,4457,4275,4300,4324,4350,4385,4288,4563,4598,4655,4695,4730,4788,4822,4849,4871,4896,4951,4994,5034,5072,4289,4304,4334,10182,10183,4373,4754,4773,4786,4807,4820,4834,4848,4866,4884,4903,5088,5173,5197,4933,5215,5231,5244,5256,5270,5282,4987,5298,5312,5320,4365,4422,4423,5635,5657,4458,4886,4931,4949,4991,5012,5038,5105,5130,5153,5178,5203,4468,4472,4501,4504,4525,4399,4272,4571,4622,4644,4669,4798,4816,9682,9684,9685,9686,7811,9016,9681,9687,9688,9689,9690,4551,10177,10178,10179,10180,10181,4588,4617,4648,4746,4774,4795,4813,4842,4864,4875,9639,9825,4638,4667,4693,4717,4476,4880,4900,4935,4970,5011,5064,5101,5133,5163,5186,5220,5243,4791,10258,4827,4867,4914,4961,5092,5136,5168,5228,5264,4299,5302,5318,5342,5358,5378,5400,5418,5443,9018,4832,4857,10171,10630,4882,5218,5238,5255,5268,5280,5292,5303,5315,5332,5346,5322,5477,5531,5366,5401,5438,5472,5404,5416,5427,5445,5454,5485,4904,5016,10147,5041,5065,5091,5119,5141,5176,5415,5434,5459,5205,5227,5249,5263,5281,5296,5257,5275,5353,5297,5308,5321,5343,5351,5376,5398,5432,5458,4544,4618,4672,4699,4735,4757,4784,4817,4841,4865,4888,4916,4947,4977,4995,5058,5214,4507,4534,5234,5260,5278,9284,10148,9291,4254,4268,4282,9010,4286,4431,4653,4687,4736,4778,4812,4844,4883,5861,5893,5922,5951,5968,5998,4475,4510,4561,4587,4924,4976,5015,5047,5124,5156,5183,5216,5247,4765,4808,5359,5397,5462,5524,9012,5553,5789,5597,4859,4915,4974,5022,5068,5110,5171,5206,5224,5245,5267,5285,5272,5290,5305,5326,5345,5363,5385,5307,5324,5375,5406,5430,5451,5468,5496,5503,5527,5516,5589,5688,5961,5546,6022,6054,6115,6164,6233,6309,7184,7199,7213,7270,7017,7045,7067,7103,4315,4332,4347,4372,4404,4429,9403,9987,10134,10135,10136,10137,10138,10139,10140,10141,10142,10144,10143,10145,10146,9988,9989)) and ((`webmarco`.`cscart_categories`.`usergroup_ids` = '') or find_in_set(0,`webmarco`.`cscart_categories`.`usergroup_ids`) or find_in_set(1,`webmarco`.`cscart_categories`.`usergroup_ids`)) and (`webmarco`.`cscart_categories`.`status` in ('A','H')) and (`webmarco`.`cscart_categories`.`storefront_id` in (0,1)))"
            }
          },
          {
            "table": {
              "table_name": "products_categories",
              "access_type": "ref",
              "possible_keys": [
                "PRIMARY",
                "pt"
              ],
              "key": "PRIMARY",
              "used_key_parts": [
                "category_id"
              ],
              "key_length": "3",
              "ref": [
                "webmarco.cscart_categories.category_id"
              ],
              "rows_examined_per_scan": 179,
              "rows_produced_per_join": 2864,
              "filtered": "100.00",
              "using_index": true,
              "cost_info": {
                "read_cost": "20.13",
                "eval_cost": "572.83",
                "prefix_cost": "1153.32",
                "data_read_per_join": "44K"
              },
              "used_columns": [
                "product_id",
                "category_id"
              ]
            }
          },
          {
            "table": {
              "table_name": "products",
              "access_type": "eq_ref",
              "possible_keys": [
                "PRIMARY",
                "age_verification",
                "status",
                "idx_parent_product_id",
                "idx_master_product_id"
              ],
              "key": "PRIMARY",
              "used_key_parts": [
                "product_id"
              ],
              "key_length": "3",
              "ref": [
                "webmarco.products_categories.product_id"
              ],
              "rows_examined_per_scan": 1,
              "rows_produced_per_join": 143,
              "filtered": "5.00",
              "cost_info": {
                "read_cost": "2864.15",
                "eval_cost": "28.64",
                "prefix_cost": "4590.30",
                "data_read_per_join": "1M"
              },
              "used_columns": [
                "product_id",
                "product_type",
                "status",
                "company_id",
                "usergroup_ids",
                "parent_product_id"
              ],
              "attached_condition": "((`webmarco`.`products`.`parent_product_id` = 0) and (`webmarco`.`products`.`company_id` = 174) and ((`webmarco`.`products`.`usergroup_ids` = '') or find_in_set(0,`webmarco`.`products`.`usergroup_ids`) or find_in_set(1,`webmarco`.`products`.`usergroup_ids`)) and (`webmarco`.`products`.`status` = 'A'))"
            }
          },
          {
            "table": {
              "table_name": "cscart_ec_table_booking_system",
              "access_type": "eq_ref",
              "possible_keys": [
                "PRIMARY"
              ],
              "key": "PRIMARY",
              "used_key_parts": [
                "product_id"
              ],
              "key_length": "4",
              "ref": [
                "webmarco.products_categories.product_id"
              ],
              "rows_examined_per_scan": 1,
              "rows_produced_per_join": 143,
              "filtered": "100.00",
              "cost_info": {
                "read_cost": "143.21",
                "eval_cost": "28.64",
                "prefix_cost": "4762.15",
                "data_read_per_join": "24K"
              },
              "used_columns": [
                "product_id",
                "booking_type"
              ],
              "attached_condition": "<if>(is_not_null_compl(cscart_ec_table_booking_system), (`webmarco`.`cscart_ec_table_booking_system`.`product_id` = `webmarco`.`products_categories`.`product_id`), true)"
            }
          },
          {
            "table": {
              "table_name": "prices",
              "access_type": "ref",
              "possible_keys": [
                "usergroup",
                "product_id",
                "lower_limit",
                "usergroup_id"
              ],
              "key": "usergroup",
              "used_key_parts": [
                "product_id"
              ],
              "key_length": "3",
              "ref": [
                "webmarco.products_categories.product_id"
              ],
              "rows_examined_per_scan": 1,
              "rows_produced_per_join": 35,
              "filtered": "25.00",
              "using_index": true,
              "cost_info": {
                "read_cost": "143.21",
                "eval_cost": "7.16",
                "prefix_cost": "4933.99",
                "data_read_per_join": "2K"
              },
              "used_columns": [
                "product_id",
                "lower_limit",
                "usergroup_id"
              ],
              "attached_condition": "((`webmarco`.`prices`.`lower_limit` = 1) and (`webmarco`.`prices`.`usergroup_id` in (0,0,1)))"
            }
          },
          {
            "table": {
              "table_name": "popularity",
              "access_type": "eq_ref",
              "possible_keys": [
                "PRIMARY",
                "total"
              ],
              "key": "PRIMARY",
              "used_key_parts": [
                "product_id"
              ],
              "key_length": "3",
              "ref": [
                "webmarco.products_categories.product_id"
              ],
              "rows_examined_per_scan": 1,
              "rows_produced_per_join": 35,
              "filtered": "100.00",
              "cost_info": {
                "read_cost": "35.80",
                "eval_cost": "7.16",
                "prefix_cost": "4976.96",
                "data_read_per_join": "1K"
              },
              "used_columns": [
                "product_id",
                "total"
              ]
            }
          },
          {
            "table": {
              "table_name": "descr1",
              "access_type": "eq_ref",
              "possible_keys": [
                "PRIMARY",
                "product_id"
              ],
              "key": "PRIMARY",
              "used_key_parts": [
                "product_id",
                "lang_code"
              ],
              "key_length": "9",
              "ref": [
                "webmarco.products_categories.product_id",
                "const"
              ],
              "rows_examined_per_scan": 1,
              "rows_produced_per_join": 35,
              "filtered": "100.00",
              "cost_info": {
                "read_cost": "35.80",
                "eval_cost": "7.16",
                "prefix_cost": "5019.92",
                "data_read_per_join": "244K"
              },
              "used_columns": [
                "product_id",
                "lang_code",
                "product"
              ]
            }
          }
        ]
      }
    }
  }
}