SELECT 
  jmj_product_descriptions.product_id, 
  jmj_product_descriptions.short_description, 
  IF(
    jmj_product_descriptions.short_description = '' 
    OR jmj_product_descriptions.short_description IS NULL, 
    jmj_product_descriptions.full_description, 
    ''
  ) AS full_description 
FROM 
  jmj_product_descriptions 
WHERE 
  jmj_product_descriptions.product_id IN (
    1705, 1730, 1654, 1662, 1713, 1733, 1682, 
    1675, 1702, 1728, 1719, 1511, 1517, 
    1523, 1526, 1645, 1647, 1670, 1659, 
    1656, 1723, 1668, 1679, 1696, 1731, 
    1699, 1732, 1707, 1697, 1735, 1695, 
    1686, 1734, 1721, 1729, 814, 816, 817, 
    818, 819, 820, 821, 822, 823, 825, 826, 
    827, 828, 895, 899, 901, 902, 813, 1460, 
    830, 868, 869, 870, 904, 905, 906, 907, 
    908, 909, 917, 920, 921, 922, 923, 924, 
    1105, 1109, 1110, 1111, 1112, 1113, 
    1114, 1115, 1116, 1117, 1118, 1119, 
    1120, 1122, 1123, 1150, 1151, 1152, 
    1059, 1060, 1032, 1033, 1034, 1035, 
    1036, 1037
  ) 
  AND jmj_product_descriptions.lang_code = 'en'

Query time 0.01043

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "124.78"
    },
    "table": {
      "table_name": "jmj_product_descriptions",
      "access_type": "ALL",
      "possible_keys": [
        "PRIMARY",
        "product_id"
      ],
      "rows_examined_per_scan": 524,
      "rows_produced_per_join": 96,
      "filtered": "18.32",
      "cost_info": {
        "read_cost": "105.58",
        "eval_cost": "19.20",
        "prefix_cost": "124.78",
        "data_read_per_join": "366K"
      },
      "used_columns": [
        "product_id",
        "lang_code",
        "short_description",
        "full_description"
      ],
      "attached_condition": "((`jmj_test`.`jmj_product_descriptions`.`product_id` in (1705,1730,1654,1662,1713,1733,1682,1675,1702,1728,1719,1511,1517,1523,1526,1645,1647,1670,1659,1656,1723,1668,1679,1696,1731,1699,1732,1707,1697,1735,1695,1686,1734,1721,1729,814,816,817,818,819,820,821,822,823,825,826,827,828,895,899,901,902,813,1460,830,868,869,870,904,905,906,907,908,909,917,920,921,922,923,924,1105,1109,1110,1111,1112,1113,1114,1115,1116,1117,1118,1119,1120,1122,1123,1150,1151,1152,1059,1060,1032,1033,1034,1035,1036,1037)) and (`jmj_test`.`jmj_product_descriptions`.`lang_code` = 'en'))"
    }
  }
}