Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5192bf7b7de0e3e491db0fd5530a8d2b53569cbee4be6a5e851d56fffd734bac' 
  AND token = 'piGnP5PJ+f9K7yXHQrnp4Zu6Werv6GfBCqf/w9KGr8M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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