Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd12e1d287cf56b5bc4270608a3715b5fe6e8a36c51733e5c16cfcaa39355bb32' 
  AND token = 'XHYa84DjQbo4O6LWTo2+HYUMUdjg9UCpVLyp4XawVuY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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