SELECT 
  cscart_products.* 
FROM 
  cscart_products 
WHERE 
  cscart_products.product_id IN (
    22172, 2873, 2854, 22268, 1942, 2857, 
    22214, 1945, 22263, 2859, 1946, 44946, 
    44943, 44944, 44947, 47974, 44945, 
    44281
  )

Query time 0.00099

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": 18,
          "filtered": 100,
          "index_condition": "cscart_products.product_id in (22172,2873,2854,22268,1942,2857,22214,1945,22263,2859,1946,44946,44943,44944,44947,47974,44945,44281)"
        }
      }
    ]
  }
}