SELECT 
  cscart_products.* 
FROM 
  cscart_products 
WHERE 
  cscart_products.product_id IN (
    41426, 1050, 2252, 3988, 36297, 2249, 
    41438, 353, 2260, 41018, 41230, 35475, 
    35470, 3984, 47486, 36465, 47608, 36299, 
    41439, 3985, 35471, 45597, 47428, 47614, 
    41440, 3616, 2044, 48551, 47612, 41431, 
    35685, 41434
  )

Query time 0.00345

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": 32,
          "filtered": 100,
          "index_condition": "cscart_products.product_id in (41426,1050,2252,3988,36297,2249,41438,353,2260,41018,41230,35475,35470,3984,47486,36465,47608,36299,41439,3985,35471,45597,47428,47614,41440,3616,2044,48551,47612,41431,35685,41434)"
        }
      }
    ]
  }
}