SELECT 
  cscart_products.* 
FROM 
  cscart_products 
WHERE 
  cscart_products.product_id IN (
    19, 1814, 1813, 1874, 1875, 974, 1574, 
    1575, 1812, 1811, 1507, 1853, 1856, 
    1918, 1919, 1862, 1861, 1857, 1883, 
    1860, 1859, 1854, 1923, 1858, 1922, 
    1855, 1920, 1469, 344, 1850, 1551, 284, 
    1475, 1276, 1569, 1198, 1179, 1281, 
    926, 1258, 1168, 1394, 1259, 1865, 390, 
    1204, 1864, 1863
  )

Query time 0.00187

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "cscart_products",
      "access_type": "range",
      "possible_keys": ["PRIMARY"],
      "key": "PRIMARY",
      "key_length": "3",
      "used_key_parts": ["product_id"],
      "rows": 48,
      "filtered": 100,
      "index_condition": "cscart_products.product_id in (19,1814,1813,1874,1875,974,1574,1575,1812,1811,1507,1853,1856,1918,1919,1862,1861,1857,1883,1860,1859,1854,1923,1858,1922,1855,1920,1469,344,1850,1551,284,1475,1276,1569,1198,1179,1281,926,1258,1168,1394,1259,1865,390,1204,1864,1863)"
    }
  }
}