Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8359fb902c727cbdcdecccdc39a422a5dfdc9a9d56284698c7b7cb8dbed55fc7' 
  AND token = 'T0OoGxE/SqQ5bI/4K7IO4Hhs26akyjYOx+8KSB5aNgQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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