SELECT 
  cscart_images.*, 
  cscart_images_links.*, 
  cscart_common_descriptions.description AS alt, 
  cscart_images.image_id AS images_image_id 
FROM 
  cscart_images_links 
  LEFT JOIN cscart_images ON cscart_images_links.image_id = cscart_images.image_id 
  LEFT JOIN cscart_common_descriptions ON cscart_common_descriptions.object_id = cscart_images.image_id 
  AND cscart_common_descriptions.object_holder = 'images' 
  AND cscart_common_descriptions.lang_code = 'en' 
WHERE 
  cscart_images_links.object_type = 'product' 
  AND cscart_images_links.type = 'A' 
  AND cscart_images_links.object_id IN (
    68342, 68345, 68351, 68349, 68343, 58579, 
    68348, 68347
  ) 
ORDER BY 
  cscart_images_links.position, 
  cscart_images_links.pair_id

Query time 0.00063

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "92.89"
    },
    "ordering_operation": {
      "using_filesort": true,
      "cost_info": {
        "sort_cost": "31.00"
      },
      "nested_loop": [
        {
          "table": {
            "table_name": "cscart_images_links",
            "access_type": "range",
            "possible_keys": [
              "object_id",
              "idx_object_type_type_position"
            ],
            "key": "object_id",
            "used_key_parts": [
              "object_id",
              "object_type",
              "type"
            ],
            "key_length": "81",
            "rows_examined_per_scan": 31,
            "rows_produced_per_join": 31,
            "filtered": "100.00",
            "index_condition": "((`cscart_db`.`cscart_images_links`.`object_type` = 'product') and (`cscart_db`.`cscart_images_links`.`type` = 'A') and (`cscart_db`.`cscart_images_links`.`object_id` in (68342,68345,68351,68349,68343,58579,68348,68347)))",
            "cost_info": {
              "read_cost": "21.94",
              "eval_cost": "3.10",
              "prefix_cost": "25.04",
              "data_read_per_join": "2K"
            },
            "used_columns": [
              "pair_id",
              "object_id",
              "object_type",
              "image_id",
              "detailed_id",
              "type",
              "position"
            ]
          }
        },
        {
          "table": {
            "table_name": "cscart_images",
            "access_type": "eq_ref",
            "possible_keys": [
              "PRIMARY"
            ],
            "key": "PRIMARY",
            "used_key_parts": [
              "image_id"
            ],
            "key_length": "4",
            "ref": [
              "cscart_db.cscart_images_links.image_id"
            ],
            "rows_examined_per_scan": 1,
            "rows_produced_per_join": 31,
            "filtered": "100.00",
            "cost_info": {
              "read_cost": "17.11",
              "eval_cost": "3.10",
              "prefix_cost": "45.25",
              "data_read_per_join": "23K"
            },
            "used_columns": [
              "image_id",
              "image_path",
              "image_x",
              "image_y",
              "is_high_res"
            ]
          }
        },
        {
          "table": {
            "table_name": "cscart_common_descriptions",
            "access_type": "eq_ref",
            "possible_keys": [
              "PRIMARY"
            ],
            "key": "PRIMARY",
            "used_key_parts": [
              "object_id",
              "lang_code",
              "object_holder"
            ],
            "key_length": "107",
            "ref": [
              "cscart_db.cscart_images.image_id",
              "const",
              "const"
            ],
            "rows_examined_per_scan": 1,
            "rows_produced_per_join": 31,
            "filtered": "100.00",
            "cost_info": {
              "read_cost": "13.53",
              "eval_cost": "3.10",
              "prefix_cost": "61.89",
              "data_read_per_join": "18K"
            },
            "used_columns": [
              "object_id",
              "description",
              "lang_code",
              "object_holder"
            ],
            "attached_condition": "<if>(is_not_null_compl(cscart_common_descriptions), (`cscart_db`.`cscart_common_descriptions`.`object_id` = `cscart_db`.`cscart_images`.`image_id`), true)"
          }
        }
      ]
    }
  }
}

Result

image_id image_path image_x image_y is_high_res pair_id object_id object_type detailed_id type position alt images_image_id
0 196390 68345 product 197728 A 1
0 196401 68347 product 197739 A 1
0 196423 68342 product 197761 A 1
0 196430 68343 product 197768 A 1
0 196434 68348 product 197772 A 1
0 196438 68349 product 197776 A 1
0 196663 58579 product 198001 A 1
0 196392 68345 product 197730 A 2
0 196402 68347 product 197740 A 2
0 196424 68342 product 197762 A 2
0 196431 68343 product 197769 A 2
0 196435 68348 product 197773 A 2
0 196439 68349 product 197777 A 2
0 196664 58579 product 198002 A 2
0 196393 68345 product 197731 A 3
0 196403 68347 product 197741 A 3
0 196425 68342 product 197763 A 3
0 196432 68343 product 197770 A 3
0 196436 68348 product 197774 A 3
0 196440 68349 product 197778 A 3
0 196665 58579 product 198003 A 3
0 196404 68347 product 197742 A 4
0 196426 68342 product 197764 A 4
0 196437 68348 product 197775 A 4
0 196442 68349 product 197780 A 4
0 196666 58579 product 198004 A 4
0 196427 68342 product 197765 A 5
0 196667 58579 product 198005 A 5
0 196428 68342 product 197766 A 6
0 196450 68351 product 197788 A 10
0 196451 68351 product 197789 A 20