SELECT 
  product_descriptions.product_id, 
  product_descriptions.short_description, 
  IF(
    product_descriptions.short_description = '' 
    OR product_descriptions.short_description IS NULL, 
    product_descriptions.full_description, 
    ''
  ) AS full_description 
FROM 
  product_descriptions 
WHERE 
  product_descriptions.product_id IN (
    411594, 411606, 411621, 411633, 411635, 
    411640, 412140, 412154, 412162, 412167, 
    412172, 412192, 412201, 412897, 412923, 
    412937, 412940, 412944, 412959, 412961, 
    413472, 413476, 413492, 413508
  ) 
  AND product_descriptions.lang_code = 'en'

Query time 0.00202

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "20.19"
    },
    "table": {
      "table_name": "product_descriptions",
      "access_type": "range",
      "possible_keys": [
        "PRIMARY",
        "product_id"
      ],
      "key": "PRIMARY",
      "used_key_parts": [
        "product_id",
        "lang_code"
      ],
      "key_length": "11",
      "rows_examined_per_scan": 24,
      "rows_produced_per_join": 24,
      "filtered": "100.00",
      "cost_info": {
        "read_cost": "17.79",
        "eval_cost": "2.40",
        "prefix_cost": "20.19",
        "data_read_per_join": "122K"
      },
      "used_columns": [
        "product_id",
        "lang_code",
        "short_description",
        "full_description"
      ],
      "attached_condition": "((`goimagine`.`product_descriptions`.`product_id` in (411594,411606,411621,411633,411635,411640,412140,412154,412162,412167,412172,412192,412201,412897,412923,412937,412940,412944,412959,412961,413472,413476,413492,413508)) and (`goimagine`.`product_descriptions`.`lang_code` = 'en'))"
    }
  }
}