Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9abad2bd5f1712a11c5f625f64376c4e292db62ffcf650708dc51d59e86965bd' 
  AND token = 'a+XtPs/kXclWsw4u+5PuIwSrM/h++GKkKIX1XlVeXyU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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