SELECT 
  cscart_products.* 
FROM 
  cscart_products 
WHERE 
  cscart_products.product_id IN (
    4332, 4348, 4346, 4334, 4351, 4342, 4347, 
    4344, 4345, 4343, 4336, 4350, 4349, 
    40364, 40359, 40371, 4341, 4339, 40367, 
    40365, 40368, 40362, 40360, 40363, 
    40369, 40370, 40361, 40366
  )

Query time 0.00213

JSON explain

{
  "query_block": {
    "select_id": 1,
    "nested_loop": [
      {
        "table": {
          "table_name": "cscart_products",
          "access_type": "range",
          "possible_keys": ["PRIMARY"],
          "key": "PRIMARY",
          "key_length": "3",
          "used_key_parts": ["product_id"],
          "rows": 28,
          "filtered": 100,
          "index_condition": "cscart_products.product_id in (4332,4348,4346,4334,4351,4342,4347,4344,4345,4343,4336,4350,4349,40364,40359,40371,4341,4339,40367,40365,40368,40362,40360,40363,40369,40370,40361,40366)"
        }
      }
    ]
  }
}