Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3cedc6c48c5a1216d82457a905c406d3614c509cdb5a433237de5ae12f7f8d2f' 
  AND token = 'xtWU52xLAfMlE+RJ7IORBmkyjLz18QpZlpsoEBnjaDQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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