Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2b8428709c4175c1eaa3d4bb8febc04594ab0bec51946ebe593f2b6e4c818846' 
  AND token = 'eCoOXjk2ASAxV0bHX/R0GmqNfQh6w4R/YzqMcKSaYq8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}