Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9d8e1654e15ac8feb028f7b50aab82bc41078527f30a372b8d3c7760a1c518f3' 
  AND token = 'NuJNw7LfxiXad9frUQvF3FmG0uoaX+DqpnSzk+J9EV8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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