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.detailed_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 = 'M' 
  AND cscart_images_links.object_id IN (
    20871, 20870, 20869, 20868, 20867, 20866, 
    20865, 20864, 2621, 1429, 23233, 23234, 
    23235, 23236, 23237, 23238, 23239, 
    15612, 15611, 15610, 6050, 15634, 15633, 
    15632, 15631, 15630, 15629, 15628, 
    15627, 15626, 6043, 23484, 23483, 23482, 
    1286, 20806, 20805, 20804
  ) 
ORDER BY 
  cscart_images_links.position, 
  cscart_images_links.pair_id

Query time 0.00148

JSON explain

{
  "query_block": {
    "select_id": 1,
    "nested_loop": [
      {
        "read_sorted_file": {
          "filesort": {
            "sort_key": "cscart_images_links.position, cscart_images_links.pair_id",
            "table": {
              "table_name": "cscart_images_links",
              "access_type": "ALL",
              "possible_keys": ["object_id"],
              "rows": 110,
              "filtered": 34.54545593,
              "attached_condition": "cscart_images_links.object_type = 'product' and cscart_images_links.`type` = 'M' and cscart_images_links.object_id in (20871,20870,20869,20868,20867,20866,20865,20864,2621,1429,23233,23234,23235,23236,23237,23238,23239,15612,15611,15610,6050,15634,15633,15632,15631,15630,15629,15628,15627,15626,6043,23484,23483,23482,1286,20806,20805,20804)"
            }
          }
        }
      },
      {
        "table": {
          "table_name": "cscart_images",
          "access_type": "eq_ref",
          "possible_keys": ["PRIMARY"],
          "key": "PRIMARY",
          "key_length": "4",
          "used_key_parts": ["image_id"],
          "ref": ["dev_db.cscart_images_links.detailed_id"],
          "rows": 1,
          "filtered": 100
        }
      },
      {
        "table": {
          "table_name": "cscart_common_descriptions",
          "access_type": "eq_ref",
          "possible_keys": ["PRIMARY"],
          "key": "PRIMARY",
          "key_length": "107",
          "used_key_parts": ["object_id", "lang_code", "object_holder"],
          "ref": ["dev_db.cscart_images.image_id", "const", "const"],
          "rows": 1,
          "filtered": 100,
          "attached_condition": "trigcond(cscart_common_descriptions.object_id = cscart_images.image_id and cscart_common_descriptions.object_holder = 'images' and cscart_common_descriptions.lang_code = 'en' and trigcond(cscart_images.image_id is not null))"
        }
      }
    ]
  }
}