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 (
    68137, 37830, 38680, 37263, 33698, 39924, 
    65259, 33717
  ) 
ORDER BY 
  cscart_images_links.position, 
  cscart_images_links.pair_id

Query time 0.00061

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "120.64"
    },
    "ordering_operation": {
      "using_filesort": true,
      "cost_info": {
        "sort_cost": "30.00"
      },
      "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": 30,
            "rows_produced_per_join": 30,
            "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 (68137,37830,38680,37263,33698,39924,65259,33717)))",
            "cost_info": {
              "read_cost": "33.95",
              "eval_cost": "3.00",
              "prefix_cost": "36.95",
              "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": 30,
            "filtered": "100.00",
            "cost_info": {
              "read_cost": "24.44",
              "eval_cost": "3.00",
              "prefix_cost": "64.39",
              "data_read_per_join": "22K"
            },
            "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": 30,
            "filtered": "100.00",
            "cost_info": {
              "read_cost": "23.25",
              "eval_cost": "3.00",
              "prefix_cost": "90.64",
              "data_read_per_join": "17K"
            },
            "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 133695 33717 product 135047 A 1
0 166017 37830 product 167366 A 1
0 193893 68137 product 195231 A 1
0 208653 33698 product 209928 A 1
0 214462 37263 product 215737 A 1
0 133696 33717 product 135048 A 2
0 166019 37830 product 167368 A 2
0 193892 68137 product 195230 A 2
0 208654 33698 product 209929 A 2
0 215008 65259 product 216283 A 2
0 133697 33717 product 135049 A 3
0 166016 37830 product 167365 A 3
0 208655 33698 product 209930 A 3
0 215009 65259 product 216284 A 3
0 133698 33717 product 135050 A 4
0 166018 37830 product 167367 A 4
0 208656 33698 product 209931 A 4
0 215010 65259 product 216285 A 4
0 133699 33717 product 135051 A 5
0 166020 37830 product 167369 A 5
0 208657 33698 product 209932 A 5
0 214457 65259 product 215732 A 5
0 133700 33717 product 135052 A 6
0 166021 37830 product 167370 A 6
0 208658 33698 product 209933 A 6
0 173353 33717 product 174699 A 7
0 208659 33698 product 209934 A 7
0 214622 37830 product 215897 A 7
0 214469 38680 product 215744 A 16