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 (
    1230, 1229, 1228, 1227, 1226, 1225, 1224, 
    1223, 1222, 1221, 1220, 1219, 1218, 
    1217, 1216, 1215, 1170, 1171, 1177, 
    1175, 1168, 1183, 1184, 1174, 1187, 
    67, 1191, 1176, 1167, 1169, 1194, 1179, 
    1180, 1181, 1197, 1182, 1201, 1202, 
    1198, 1178, 603, 1185, 1209, 1186, 1210, 
    1211, 1203, 1212
  ) 
  AND cscart_product_descriptions.lang_code = 'en'

Query time 0.00155

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 (1230,1229,1228,1227,1226,1225,1224,1223,1222,1221,1220,1219,1218,1217,1216,1215,1170,1171,1177,1175,1168,1183,1184,1174,1187,67,1191,1176,1167,1169,1194,1179,1180,1181,1197,1182,1201,1202,1198,1178,603,1185,1209,1186,1210,1211,1203,1212) and cscart_product_descriptions.lang_code = 'en'"
    }
  }
}

Result

product_id short_description full_description meta_keywords meta_description search_words promo_text unit_name
67
603
1167
1168
1169
1170
1171
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1191
1194
1197
1198
1201
1202
1203
1209
1210
1211
1212
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230