Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2dc30bf6cd4a15a84551fc9c5c9ecc6ff4b9a80919fffba933aca69786fea129' 
  AND token = 'sEuzP/JKGOYmrXNJzMa/GkIsmf1FHlQwyWz5RVY9UUw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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