SELECT 
  cscart_products.* 
FROM 
  cscart_products 
WHERE 
  cscart_products.product_id IN (
    40154, 3601, 24018, 40148, 1437, 32127, 
    1286, 40455, 40142, 41398, 24127, 49225, 
    46716, 41399, 21464, 48826, 286, 45503, 
    26604, 294, 26608, 20616, 48844, 47086, 
    1356, 48772, 20804, 26467, 834, 39612, 
    788, 2254
  )

Query time 0.00225

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 (40154,3601,24018,40148,1437,32127,1286,40455,40142,41398,24127,49225,46716,41399,21464,48826,286,45503,26604,294,26608,20616,48844,47086,1356,48772,20804,26467,834,39612,788,2254)"
        }
      }
    ]
  }
}