Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f59f5bbb3b970868fb9f0a8db75ddf1af5937b84993a2054530ae3514c321ead' 
  AND token = '1p6fLIGaNqDi7Gv5+ytTRi+RR04flwWk3nOj0ML6srI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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