Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '27e50a85e3f8c9f37733daa1e384b0c76d1e60cb98c7be1635a23cc452747ccc' 
  AND token = '5nyOt7FV/vsaA43uthn/466TfDUfq0jd6HPDkgg0Fd4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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