SELECT 
  cscart_products.* 
FROM 
  cscart_products 
WHERE 
  cscart_products.product_id IN (
    1705, 1704, 1609, 1935, 1936, 1929, 1528, 
    1527, 1526, 1508, 1534, 1533, 1841, 
    1531, 1529, 1530, 1843, 1532, 1515, 
    1904, 1873, 1897, 1896, 1728, 1607, 
    1608, 1606, 1703, 1578, 1396, 1605, 
    1206, 1586, 1934, 1932, 1933, 1655, 
    1656, 1542, 1640, 1543, 1927, 1926, 
    1815, 1808, 1541, 1829, 1828
  )

Query time 0.00179

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 (1705,1704,1609,1935,1936,1929,1528,1527,1526,1508,1534,1533,1841,1531,1529,1530,1843,1532,1515,1904,1873,1897,1896,1728,1607,1608,1606,1703,1578,1396,1605,1206,1586,1934,1932,1933,1655,1656,1542,1640,1543,1927,1926,1815,1808,1541,1829,1828)"
    }
  }
}