Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ca6e6b581826ae2d537514600d7f7e1e47b31bc18b456cc5255257cf4efd273f' 
  AND token = 'yU3GYJ5XgJMJzIsmS0Juewp62QBWX+b2vBmVaToI3YE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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