SELECT 
  cscart_products.* 
FROM 
  cscart_products 
WHERE 
  cscart_products.product_id IN (
    1896, 1894, 49873, 1057, 1716, 43824, 
    34667, 2238, 34666, 1895, 1715, 5547, 
    43823, 21780, 5548, 46737, 5556, 16607, 
    46735, 5554, 2113, 5551, 5553, 3470, 
    3469, 46739, 16601, 16612, 1754, 6529, 
    27350, 21600
  )

Query time 0.00187

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 (1896,1894,49873,1057,1716,43824,34667,2238,34666,1895,1715,5547,43823,21780,5548,46737,5556,16607,46735,5554,2113,5551,5553,3470,3469,46739,16601,16612,1754,6529,27350,21600)"
        }
      }
    ]
  }
}