SELECT 
  cscart_products.* 
FROM 
  cscart_products 
WHERE 
  cscart_products.product_id IN (
    1896, 50216, 27361, 35256, 47632, 1893, 
    47593, 49169, 47613, 48823, 46585, 
    6091, 6370, 47903, 1894, 23152, 47631, 
    1533, 49873, 6358, 6357, 47597, 5503, 
    18608, 42255, 40350, 1057, 2803, 3568, 
    17265, 3567, 5990
  )

Query time 0.00229

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 (1896,50216,27361,35256,47632,1893,47593,49169,47613,48823,46585,6091,6370,47903,1894,23152,47631,1533,49873,6358,6357,47597,5503,18608,42255,40350,1057,2803,3568,17265,3567,5990)"
        }
      }
    ]
  }
}