SELECT 
  cscart_product_descriptions.product_id, 
  cscart_product_descriptions.short_description, 
  IF(
    cscart_product_descriptions.short_description = '' 
    OR cscart_product_descriptions.short_description IS NULL, 
    cscart_product_descriptions.full_description, 
    ''
  ) AS full_description, 
  cscart_product_descriptions.meta_keywords, 
  cscart_product_descriptions.meta_description, 
  cscart_product_descriptions.search_words, 
  cscart_product_descriptions.promo_text, 
  cscart_product_descriptions.unit_name 
FROM 
  cscart_product_descriptions 
WHERE 
  cscart_product_descriptions.product_id IN (
    1030, 1437, 1780, 1031, 807, 1487, 806, 
    1032, 1033, 1470, 370, 1573, 1752, 1424, 
    1423, 1744, 934, 1010, 1434, 1818, 153, 
    1290, 1291, 1292, 1917, 1916, 505, 395, 
    1795, 215, 214, 217, 212, 216, 234, 213, 
    1491, 1496, 1497, 1498, 1480, 1570, 
    1571, 1572, 1626, 1784, 1286, 1287
  ) 
  AND cscart_product_descriptions.lang_code = 'en'

Query time 0.00156

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "cscart_product_descriptions",
      "access_type": "range",
      "possible_keys": ["PRIMARY", "product_id"],
      "key": "PRIMARY",
      "key_length": "9",
      "used_key_parts": ["product_id", "lang_code"],
      "rows": 48,
      "filtered": 100,
      "index_condition": "cscart_product_descriptions.product_id in (1030,1437,1780,1031,807,1487,806,1032,1033,1470,370,1573,1752,1424,1423,1744,934,1010,1434,1818,153,1290,1291,1292,1917,1916,505,395,1795,215,214,217,212,216,234,213,1491,1496,1497,1498,1480,1570,1571,1572,1626,1784,1286,1287) and cscart_product_descriptions.lang_code = 'en'"
    }
  }
}

Result

product_id short_description full_description meta_keywords meta_description search_words promo_text unit_name
153
212
213
214
215
216
217
234
370
395
505
806
807
934
1010
1030
1031
1032
1033
1286
1287
1290
1291
1292
1423
1424
1434
1437
1470
1480
1487
1491
1496
1497
1498
1570
1571
1572
1573
1626
1744
1752
1780
1784
1795
1818
1916
1917