SELECT 
  `F`.`path`, 
  `PI`.`product_id`, 
  `PI`.`alt` 
FROM 
  `cscart_products__images` AS `PI` 
  LEFT JOIN `files` AS `F` ON `PI`.`watermark_small_file_id` = `F`.`id` 
WHERE 
  `PI`.`product_id` IN (
    '26376', '25593', '26077', '26421', 
    '26521', '27178', '26592', '27175', 
    '25896', '25900', '26757'
  )

Query time 0.00051

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "20.45"
    },
    "nested_loop": [
      {
        "table": {
          "table_name": "PI",
          "access_type": "range",
          "possible_keys": [
            "product_id"
          ],
          "key": "product_id",
          "used_key_parts": [
            "product_id"
          ],
          "key_length": "3",
          "rows_examined_per_scan": 15,
          "rows_produced_per_join": 15,
          "filtered": "100.00",
          "index_condition": "(`dev2`.`PI`.`product_id` in ('26376','25593','26077','26421','26521','27178','26592','27175','25896','25900','26757'))",
          "cost_info": {
            "read_cost": "8.01",
            "eval_cost": "1.50",
            "prefix_cost": "9.51",
            "data_read_per_join": "480"
          },
          "used_columns": [
            "product_id",
            "watermark_small_file_id",
            "alt"
          ]
        }
      },
      {
        "table": {
          "table_name": "F",
          "access_type": "eq_ref",
          "possible_keys": [
            "PRIMARY"
          ],
          "key": "PRIMARY",
          "used_key_parts": [
            "id"
          ],
          "key_length": "4",
          "ref": [
            "dev2.PI.watermark_small_file_id"
          ],
          "rows_examined_per_scan": 1,
          "rows_produced_per_join": 15,
          "filtered": "100.00",
          "cost_info": {
            "read_cost": "9.44",
            "eval_cost": "1.50",
            "prefix_cost": "20.45",
            "data_read_per_join": "55K"
          },
          "used_columns": [
            "id",
            "path"
          ]
        }
      }
    ]
  }
}

Result

path product_id alt
https://s3.timeweb.cloud/482029f9-prod/products__images/25593_1ccf44b2a74c_processed_ccf8d7be95fd4e839bae18db0f2f3727.webp 25593
https://s3.timeweb.cloud/482029f9-prod/products__images/25593_be6152bd8fc1_processed_6a344b54416f397890d4b78d8c11822c.webp 25593
https://s3.timeweb.cloud/482029f9-prod/products__images/25593_20fb328ff348_processed_508359a853096d28775386a0f677f2ac.webp 25593
https://s3.timeweb.cloud/482029f9-prod/products__images/25896_82203698ca70_processed_lot_98542_20170809211105_43118_G8..jpg.webp 25896
https://s3.timeweb.cloud/482029f9-prod/products__images/25900_e493ed5ddcd8_processed_lot_103475_20180601113756_33088.jpg.webp 25900
https://s3.timeweb.cloud/482029f9-prod/products__images/25900_733affe5f6a0_processed_lot_103475_20180601113803_33088_.jpg.webp 25900
https://s3.timeweb.cloud/482029f9-prod/products__images/26077_2e5a9d051d91_processed_lot_106784_20190206142142_ARK_3691.jpg.webp 26077
https://s3.timeweb.cloud/482029f9-prod/products__images/26376_84c1ae8b6374_processed_lot_104035_20180702085452_1.jpg.webp 26376
https://s3.timeweb.cloud/482029f9-prod/products__images/26421_046cf0821aba_processed_lot_101864_20180312092258_4208.jpg.webp 26421
https://s3.timeweb.cloud/482029f9-prod/products__images/26521_235ce395350e_processed_lot_85496_20160511145216_4208-111-13.jpg.webp 26521
https://s3.timeweb.cloud/482029f9-prod/products__images/26592_60488aea8d6c_processed_lot_97382_20170602163219_vahta.JPG.webp 26592
https://s3.timeweb.cloud/482029f9-prod/products__images/26757_b5d5ddda01e3_processed_lot_96666_20170424134622_vahtovyy_avtobus_22_mesta_kamaz_43502-3036_4.jpg.webp 26757
https://s3.timeweb.cloud/482029f9-prod/products__images/27175_24b9d07484f2_processed_lot_78633_20151105110851_4.____________________________.jpg.webp 27175
https://s3.timeweb.cloud/482029f9-prod/products__images/27178_e3748d6c62df_processed_lot_66171_20151109090602_1506878123.jpg.webp 27178
https://s3.timeweb.cloud/482029f9-prod/products__images/27178_5f006a9ea464_processed_lot_66171_20151109090611_1506878503.jpg.webp 27178