SELECT 
  cscart_products.* 
FROM 
  cscart_products 
WHERE 
  cscart_products.product_id IN (
    1285, 1283, 1284, 1282, 1401, 1402, 1403, 
    1384, 727, 729, 726, 1583, 251, 237, 
    238, 373, 372, 339, 365, 236, 786, 381, 
    389, 1914, 1321, 1368, 1877, 1876, 1878, 
    1806, 1794, 1807, 1884, 1886, 1889, 
    1890, 1881, 1879, 1880, 1882, 1888, 
    1871, 1887, 715, 714, 1485, 1915, 345
  )

Query time 0.00184

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 (1285,1283,1284,1282,1401,1402,1403,1384,727,729,726,1583,251,237,238,373,372,339,365,236,786,381,389,1914,1321,1368,1877,1876,1878,1806,1794,1807,1884,1886,1889,1890,1881,1879,1880,1882,1888,1871,1887,715,714,1485,1915,345)"
    }
  }
}