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 
WHERE 
  1 
  AND companies.status IN ('A') 
  AND products.company_id IN (
    1, 
    25, 
    34, 
    35, 
    36, 
    37, 
    38, 
    39, 
    40, 
    41, 
    42, 
    43, 
    44, 
    45, 
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    104, 
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    106, 
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    223, 
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    226, 
    227, 
    228, 
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    230, 
    231, 
    232, 
    233, 
    234, 
    235, 
    236, 
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    239, 
    240, 
    241, 
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    244, 
    245, 
    246, 
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    250, 
    251, 
    252, 
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    255, 
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    259, 
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    261, 
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    297, 
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    689, 
    690, 
    691, 
    692, 
    693, 
    694, 
    695, 
    696, 
    697, 
    707, 
    719, 
    0
  ) 
  AND products.company_id = 541 
  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 = 541 
  AND products.parent_product_id = 0 
GROUP BY 
  products.product_id 
ORDER BY 
  products.timestamp desc, 
  products.product_id ASC 
LIMIT 
  420, 20

Query time 0.39511

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "65505.08"
    },
    "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": "products",
              "access_type": "index_merge",
              "possible_keys": [
                "PRIMARY",
                "age_verification",
                "status",
                "idx_parent_product_id",
                "idx_master_product_id"
              ],
              "key": "intersect(status,idx_parent_product_id)",
              "key_length": "3,4",
              "rows_examined_per_scan": 80280,
              "rows_produced_per_join": 8028,
              "filtered": "10.00",
              "cost_info": {
                "read_cost": "37826.98",
                "eval_cost": "1605.60",
                "prefix_cost": "39432.58",
                "data_read_per_join": "61M"
              },
              "used_columns": [
                "product_id",
                "product_type",
                "status",
                "company_id",
                "timestamp",
                "usergroup_ids",
                "parent_product_id"
              ],
              "attached_condition": "((`webmarco`.`products`.`parent_product_id` = 0) and (`webmarco`.`products`.`company_id` = 541) 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.product_id"
              ],
              "rows_examined_per_scan": 1,
              "rows_produced_per_join": 8028,
              "filtered": "100.00",
              "cost_info": {
                "read_cost": "8028.00",
                "eval_cost": "1605.60",
                "prefix_cost": "49066.18",
                "data_read_per_join": "1M"
              },
              "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`.`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.product_id"
              ],
              "rows_examined_per_scan": 1,
              "rows_produced_per_join": 2007,
              "filtered": "25.00",
              "using_index": true,
              "cost_info": {
                "read_cost": "8028.00",
                "eval_cost": "401.40",
                "prefix_cost": "58699.78",
                "data_read_per_join": "125K"
              },
              "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": "products_categories",
              "access_type": "ref",
              "possible_keys": [
                "PRIMARY",
                "pt"
              ],
              "key": "pt",
              "used_key_parts": [
                "product_id"
              ],
              "key_length": "3",
              "ref": [
                "webmarco.products.product_id"
              ],
              "rows_examined_per_scan": 1,
              "rows_produced_per_join": 3330,
              "filtered": "100.00",
              "using_index": true,
              "cost_info": {
                "read_cost": "2008.95",
                "eval_cost": "666.10",
                "prefix_cost": "61374.83",
                "data_read_per_join": "52K"
              },
              "used_columns": [
                "product_id",
                "category_id"
              ]
            }
          },
          {
            "table": {
              "table_name": "cscart_categories",
              "access_type": "eq_ref",
              "possible_keys": [
                "PRIMARY",
                "c_status",
                "p_category_id"
              ],
              "key": "PRIMARY",
              "used_key_parts": [
                "category_id"
              ],
              "key_length": "3",
              "ref": [
                "webmarco.products_categories.category_id"
              ],
              "rows_examined_per_scan": 1,
              "rows_produced_per_join": 166,
              "filtered": "5.00",
              "cost_info": {
                "read_cost": "3330.49",
                "eval_cost": "33.30",
                "prefix_cost": "65371.42",
                "data_read_per_join": "987K"
              },
              "used_columns": [
                "category_id",
                "usergroup_ids",
                "status",
                "storefront_id"
              ],
              "attached_condition": "(((`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": "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.product_id",
                "const"
              ],
              "rows_examined_per_scan": 1,
              "rows_produced_per_join": 166,
              "filtered": "100.00",
              "cost_info": {
                "read_cost": "100.35",
                "eval_cost": "33.30",
                "prefix_cost": "65505.08",
                "data_read_per_join": "1M"
              },
              "used_columns": [
                "product_id",
                "lang_code",
                "product"
              ]
            }
          }
        ]
      }
    }
  }
}