Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4e0b52a5e5f97c3067dc06c1b968d71ee5563a80c6481ab6abe76bd92449de49' 
  AND token = '2XaWmCeFAsMW906SV9i7PaG82JIEcAR0GhbKQbtmbj4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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