Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '87c9c15b04e0f89e8bbfcd1d35dc4614902b50373617444ad7bd92388440ffa3' 
  AND token = 'mu+uSnYXQR7iCuktft14qk/oOeAihwkjMe2Ka5TMf8g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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