SELECT 
  cscart_bm_snapping.grid_id as grid_id, 
  cscart_bm_snapping.block_id as block_id, 
  IFNULL(
    dynamic_object_content.content, 
    default_content.content
  ) as content, 
  IFNULL(
    dynamic_object_content.object_id, 
    default_content.object_id
  ) AS object_id, 
  IFNULL(
    dynamic_object_content.object_type, 
    default_content.object_type
  ) AS object_type, 
  cscart_bm_block_statuses.object_ids as object_ids, 
  cscart_bm_snapping.*, 
  cscart_bm_blocks.*, 
  cscart_bm_blocks_descriptions.* 
FROM 
  cscart_bm_snapping 
  LEFT JOIN cscart_bm_blocks ON cscart_bm_blocks.block_id = cscart_bm_snapping.block_id 
  LEFT JOIN cscart_bm_block_statuses ON cscart_bm_snapping.snapping_id = cscart_bm_block_statuses.snapping_id 
  AND cscart_bm_block_statuses.object_type LIKE 'categories' 
  LEFT JOIN cscart_bm_blocks_descriptions ON cscart_bm_blocks.block_id = cscart_bm_blocks_descriptions.block_id 
  LEFT JOIN cscart_bm_blocks_content AS default_content ON cscart_bm_blocks.block_id = default_content.block_id 
  AND cscart_bm_blocks_descriptions.lang_code = default_content.lang_code 
  AND default_content.snapping_id = 0 
  AND default_content.object_id = 0 
  AND default_content.object_type like '' 
  LEFT JOIN cscart_bm_blocks_content AS dynamic_object_content ON cscart_bm_blocks.block_id = dynamic_object_content.block_id 
  AND cscart_bm_blocks_descriptions.lang_code = dynamic_object_content.lang_code 
  AND dynamic_object_content.object_id = 6829 
  AND dynamic_object_content.object_type like 'categories' 
WHERE 
  cscart_bm_snapping.grid_id IN (
    447821, 447822, 447823, 447827, 447826, 
    447824, 447825, 447972, 447973, 447977, 
    447978, 447974, 447975, 447976, 447979, 
    447980, 447829, 447830, 447832, 447833, 
    447834, 447836, 447837, 447841, 447845, 
    447838, 447842, 447828, 447843, 447839, 
    447831, 447835, 447840, 447844, 447849, 
    447853, 447864, 447854, 447857, 447850, 
    447858, 447848, 447852, 447851, 447855, 
    447861, 447860, 447856, 447863, 447859, 
    447862
  ) 
  AND cscart_bm_blocks_descriptions.lang_code = 'en' 
ORDER BY 
  cscart_bm_snapping.order, 
  cscart_bm_snapping.block_id

Query time 0.00581

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "3054.31"
    },
    "ordering_operation": {
      "using_filesort": true,
      "cost_info": {
        "sort_cost": "1985.03"
      },
      "nested_loop": [
        {
          "table": {
            "table_name": "cscart_bm_snapping",
            "access_type": "range",
            "possible_keys": [
              "grid_id"
            ],
            "key": "grid_id",
            "used_key_parts": [
              "grid_id"
            ],
            "key_length": "4",
            "rows_examined_per_scan": 86,
            "rows_produced_per_join": 86,
            "filtered": "100.00",
            "index_condition": "(`webmarco`.`cscart_bm_snapping`.`grid_id` in (447821,447822,447823,447827,447826,447824,447825,447972,447973,447977,447978,447974,447975,447976,447979,447980,447829,447830,447832,447833,447834,447836,447837,447841,447845,447838,447842,447828,447843,447839,447831,447835,447840,447844,447849,447853,447864,447854,447857,447850,447858,447848,447852,447851,447855,447861,447860,447856,447863,447859,447862))",
            "cost_info": {
              "read_cost": "154.21",
              "eval_cost": "17.20",
              "prefix_cost": "171.41",
              "data_read_per_join": "67K"
            },
            "used_columns": [
              "snapping_id",
              "block_id",
              "grid_id",
              "wrapper",
              "user_class",
              "order",
              "status",
              "ab__ab_hide_block"
            ]
          }
        },
        {
          "table": {
            "table_name": "cscart_bm_block_statuses",
            "access_type": "ref",
            "possible_keys": [
              "snapping_id"
            ],
            "key": "snapping_id",
            "used_key_parts": [
              "snapping_id"
            ],
            "key_length": "4",
            "ref": [
              "webmarco.cscart_bm_snapping.snapping_id"
            ],
            "rows_examined_per_scan": 1,
            "rows_produced_per_join": 86,
            "filtered": "100.00",
            "cost_info": {
              "read_cost": "86.00",
              "eval_cost": "17.20",
              "prefix_cost": "274.61",
              "data_read_per_join": "10K"
            },
            "used_columns": [
              "snapping_id",
              "object_ids",
              "object_type"
            ],
            "attached_condition": "<if>(is_not_null_compl(cscart_bm_block_statuses), ((`webmarco`.`cscart_bm_snapping`.`snapping_id` = `webmarco`.`cscart_bm_block_statuses`.`snapping_id`) and (`webmarco`.`cscart_bm_block_statuses`.`object_type` like 'categories')), true)"
          }
        },
        {
          "table": {
            "table_name": "cscart_bm_blocks",
            "access_type": "eq_ref",
            "possible_keys": [
              "PRIMARY"
            ],
            "key": "PRIMARY",
            "used_key_parts": [
              "block_id"
            ],
            "key_length": "4",
            "ref": [
              "webmarco.cscart_bm_snapping.block_id"
            ],
            "rows_examined_per_scan": 1,
            "rows_produced_per_join": 86,
            "filtered": "100.00",
            "cost_info": {
              "read_cost": "86.00",
              "eval_cost": "17.20",
              "prefix_cost": "377.81",
              "data_read_per_join": "18K"
            },
            "used_columns": [
              "block_id",
              "type",
              "properties",
              "company_id",
              "storefront_id"
            ]
          }
        },
        {
          "table": {
            "table_name": "cscart_bm_blocks_descriptions",
            "access_type": "eq_ref",
            "possible_keys": [
              "PRIMARY"
            ],
            "key": "PRIMARY",
            "used_key_parts": [
              "block_id",
              "lang_code"
            ],
            "key_length": "10",
            "ref": [
              "webmarco.cscart_bm_snapping.block_id",
              "const"
            ],
            "rows_examined_per_scan": 1,
            "rows_produced_per_join": 86,
            "filtered": "100.00",
            "cost_info": {
              "read_cost": "86.00",
              "eval_cost": "17.20",
              "prefix_cost": "481.01",
              "data_read_per_join": "17K"
            },
            "used_columns": [
              "block_id",
              "lang_code",
              "name"
            ]
          }
        },
        {
          "table": {
            "table_name": "default_content",
            "access_type": "ref",
            "possible_keys": [
              "PRIMARY"
            ],
            "key": "PRIMARY",
            "used_key_parts": [
              "block_id",
              "snapping_id",
              "lang_code",
              "object_id"
            ],
            "key_length": "18",
            "ref": [
              "webmarco.cscart_bm_snapping.block_id",
              "const",
              "webmarco.cscart_bm_blocks_descriptions.lang_code",
              "const"
            ],
            "rows_examined_per_scan": 1,
            "rows_produced_per_join": 86,
            "filtered": "100.00",
            "cost_info": {
              "read_cost": "86.00",
              "eval_cost": "17.20",
              "prefix_cost": "584.21",
              "data_read_per_join": "18K"
            },
            "used_columns": [
              "snapping_id",
              "object_id",
              "object_type",
              "block_id",
              "lang_code",
              "content"
            ],
            "attached_condition": "<if>(is_not_null_compl(default_content), (`webmarco`.`default_content`.`object_type` like ''), true)"
          }
        },
        {
          "table": {
            "table_name": "dynamic_object_content",
            "access_type": "ref",
            "possible_keys": [
              "PRIMARY"
            ],
            "key": "PRIMARY",
            "used_key_parts": [
              "block_id"
            ],
            "key_length": "4",
            "ref": [
              "webmarco.cscart_bm_snapping.block_id"
            ],
            "rows_examined_per_scan": 23,
            "rows_produced_per_join": 1985,
            "filtered": "100.00",
            "cost_info": {
              "read_cost": "88.07",
              "eval_cost": "397.01",
              "prefix_cost": "1069.29",
              "data_read_per_join": "434K"
            },
            "used_columns": [
              "snapping_id",
              "object_id",
              "object_type",
              "block_id",
              "lang_code",
              "content"
            ],
            "attached_condition": "<if>(is_not_null_compl(dynamic_object_content), ((`webmarco`.`dynamic_object_content`.`object_id` = 6829) and (`webmarco`.`dynamic_object_content`.`lang_code` = `webmarco`.`cscart_bm_blocks_descriptions`.`lang_code`) and (`webmarco`.`dynamic_object_content`.`object_type` like 'categories')), true)"
          }
        }
      ]
    }
  }
}