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 (
    710, 706, 1760, 1844, 1689, 1754, 1755, 
    1840, 1756, 1753, 1792, 1791, 1793, 
    1789, 1472, 1716, 1714, 1715, 1720, 
    1719, 1722, 1713, 1718, 1717, 1867, 
    1721, 1145, 1891, 1202, 247, 296, 1218, 
    1765, 820, 1816, 1651, 1661, 255, 65, 
    1959, 1011, 1685, 1207, 1210, 1203, 
    1389, 1188, 1190, 1209, 1186, 114, 1810, 
    113, 1742, 1598, 1565, 1597, 1708, 1694, 
    1732, 1596, 1632, 79, 297, 1852, 1456, 
    653, 1465, 1494, 1620, 1619, 1457, 1618, 
    1623, 1624, 1395, 1614, 1604, 1801, 
    1802, 1724, 1727, 1726, 1599, 1725, 
    1600, 1872, 1603, 1560, 1513, 1550, 
    1548, 1547, 1763, 1764, 1506
  ) 
  AND cscart_product_descriptions.lang_code = 'en'

Query time 0.00113

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": 96,
      "filtered": 100,
      "index_condition": "cscart_product_descriptions.product_id in (710,706,1760,1844,1689,1754,1755,1840,1756,1753,1792,1791,1793,1789,1472,1716,1714,1715,1720,1719,1722,1713,1718,1717,1867,1721,1145,1891,1202,247,296,1218,1765,820,1816,1651,1661,255,65,1959,1011,1685,1207,1210,1203,1389,1188,1190,1209,1186,114,1810,113,1742,1598,1565,1597,1708,1694,1732,1596,1632,79,297,1852,1456,653,1465,1494,1620,1619,1457,1618,1623,1624,1395,1614,1604,1801,1802,1724,1727,1726,1599,1725,1600,1872,1603,1560,1513,1550,1548,1547,1763,1764,1506) and cscart_product_descriptions.lang_code = 'en'"
    }
  }
}

Result

product_id short_description full_description meta_keywords meta_description search_words promo_text unit_name
65
79
113
114
247
255
296
297
653
706
710
820
1011
1145
1186
1188
1190
1202
1203
1207
1209
1210
1218
1389
1395
1456
1457
1465
1472
1494
1506
1513
1547
1548
1550
1560
1565
1596
1597
1598
1599
1600
1603
1604
1614
1618
1619
1620
1623
1624
1632
1651
1661
1685
1689
1694
1708
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1724
1725
1726
1727
1732
1742
1753
1754
1755
1756
1760
1763
1764
1765
1789
1791
1792
1793
1801
1802
1810
1816
1840
1844
1852
1867
1872
1891
1959