Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '309a10996b03f592135d74fc5eb10e9d7f0cfb84e44c6346819b3183cac31023' 
  AND token = 'NdoLiWeQAyIF1M9ZyUssgIM9G9ajs22aBnU2qCy7SyQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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