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 '' 
  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 = 0 
  AND dynamic_object_content.object_type like '' 
WHERE 
  cscart_bm_snapping.grid_id IN (
    448417, 448420, 448418, 448421, 448425, 
    448422, 448423, 448424, 448419, 448426, 
    448427, 448430, 448434, 448428, 448429, 
    448431, 448432, 448433, 448435, 448436, 
    448437, 448438, 448439, 448441, 448440, 
    448442, 448443, 448444
  ) 
  AND cscart_bm_blocks_descriptions.lang_code = 'en' 
ORDER BY 
  cscart_bm_snapping.order, 
  cscart_bm_snapping.block_id

Query time 0.00251

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "1599.51"
    },
    "ordering_operation": {
      "using_filesort": true,
      "cost_info": {
        "sort_cost": "1038.68"
      },
      "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": 45,
            "rows_produced_per_join": 45,
            "filtered": "100.00",
            "index_condition": "(`webmarco`.`cscart_bm_snapping`.`grid_id` in (448417,448420,448418,448421,448425,448422,448423,448424,448419,448426,448427,448430,448434,448428,448429,448431,448432,448433,448435,448436,448437,448438,448439,448441,448440,448442,448443,448444))",
            "cost_info": {
              "read_cost": "82.01",
              "eval_cost": "9.00",
              "prefix_cost": "91.01",
              "data_read_per_join": "35K"
            },
            "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": 45,
            "filtered": "100.00",
            "cost_info": {
              "read_cost": "45.00",
              "eval_cost": "9.00",
              "prefix_cost": "145.01",
              "data_read_per_join": "5K"
            },
            "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 '')), 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": 45,
            "filtered": "100.00",
            "cost_info": {
              "read_cost": "45.00",
              "eval_cost": "9.00",
              "prefix_cost": "199.01",
              "data_read_per_join": "9K"
            },
            "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": 45,
            "filtered": "100.00",
            "cost_info": {
              "read_cost": "45.00",
              "eval_cost": "9.00",
              "prefix_cost": "253.01",
              "data_read_per_join": "9K"
            },
            "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": 45,
            "filtered": "100.00",
            "cost_info": {
              "read_cost": "45.00",
              "eval_cost": "9.00",
              "prefix_cost": "307.01",
              "data_read_per_join": "9K"
            },
            "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": 1038,
            "filtered": "100.00",
            "cost_info": {
              "read_cost": "46.08",
              "eval_cost": "207.74",
              "prefix_cost": "560.83",
              "data_read_per_join": "227K"
            },
            "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` = 0) and (`webmarco`.`dynamic_object_content`.`lang_code` = `webmarco`.`cscart_bm_blocks_descriptions`.`lang_code`) and (`webmarco`.`dynamic_object_content`.`object_type` like '')), true)"
          }
        }
      ]
    }
  }
}