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 (
    133119, 133181, 132710, 136506, 144342, 
    133145, 132999, 133122, 132714, 144442, 
    133121, 133127, 132652, 136514, 133132, 
    133143, 133136, 133172, 133182, 133139, 
    140843, 133168, 133123, 133180
  ) 
  AND product_descriptions.lang_code = 'en'

Query time 0.00637

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "20.31"
    },
    "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": "17.91",
        "eval_cost": "2.40",
        "prefix_cost": "20.31",
        "data_read_per_join": "122K"
      },
      "used_columns": [
        "product_id",
        "lang_code",
        "short_description",
        "full_description"
      ],
      "attached_condition": "((`goimagine`.`product_descriptions`.`product_id` in (133119,133181,132710,136506,144342,133145,132999,133122,132714,144442,133121,133127,132652,136514,133132,133143,133136,133172,133182,133139,140843,133168,133123,133180)) and (`goimagine`.`product_descriptions`.`lang_code` = 'en'))"
    }
  }
}