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 (
    1349, 27432, 1348, 2148, 20015, 24281, 
    21543, 21046, 25035, 29202, 74829, 
    62880, 73695, 71786, 27395, 45770, 
    63596, 167241, 54750, 45664, 54882, 
    54924, 60119, 153527
  ) 
  AND product_descriptions.lang_code = 'en'

Query time 0.00864

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "20.45"
    },
    "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": "18.05",
        "eval_cost": "2.40",
        "prefix_cost": "20.45",
        "data_read_per_join": "122K"
      },
      "used_columns": [
        "product_id",
        "lang_code",
        "short_description",
        "full_description"
      ],
      "attached_condition": "((`goimagine`.`product_descriptions`.`product_id` in (1349,27432,1348,2148,20015,24281,21543,21046,25035,29202,74829,62880,73695,71786,27395,45770,63596,167241,54750,45664,54882,54924,60119,153527)) and (`goimagine`.`product_descriptions`.`lang_code` = 'en'))"
    }
  }
}