Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '894093443933453581e33b18d7f717d1046e3bb9e07dd7be8fe7bb89c8d0c4cb' 
  AND token = 'TY09GryjLZzakdjNIwlrxdeRzZgOk1OZiZxsuVpsTQE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

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