SELECT 
  cscart_products.* 
FROM 
  cscart_products 
WHERE 
  cscart_products.product_id IN (
    243, 246, 244, 242, 245, 240, 290, 508, 
    295, 286, 259, 260, 249, 716, 719, 211, 
    253, 239, 93, 262, 325, 221, 809, 254, 
    1237, 271, 1009, 264, 725, 250, 266, 
    235, 873, 872, 875, 874, 666, 300, 669, 
    664, 309, 287, 288, 668, 667, 308, 662, 
    663
  )

Query time 0.00175

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 (243,246,244,242,245,240,290,508,295,286,259,260,249,716,719,211,253,239,93,262,325,221,809,254,1237,271,1009,264,725,250,266,235,873,872,875,874,666,300,669,664,309,287,288,668,667,308,662,663)"
    }
  }
}