Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '656625141516d4bf99b34c6375f40a6237f7f9c5025d9cec8005725faff06e5f' 
  AND token = '8Laq+ryY0MpFRzoSyknvE1iXoRMY9QsR7lIuGgUCvtI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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