Sandbox

SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = 'cbbfefda7f4666a19c247b8a6fdf43f673662be937e166b76231dd9c2ff45531' 
  AND token = 'qhKmh7CfzavbTmkRaUFJGMxsuW+Agd3w4mJHKH9AQvU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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