convert raw query in laravel eloquent way

How to convert this query in Laravel eloquent way?

SELECT * FROM posts WHERE status=1  and now() BETWEEN start_time and end_time ORDER BY id DESC LIMIT 1

// What so far i have tried 

Post::whereStatus(1)->orderBy('id','desc')->get()

"and now() BETWEEN start_time and end_time" .I am unable to convert this part in eloquent way.

via Chebli Mohamed