If QR is on time, you have more than enough time. If you are a fast runner and know where things are, there maybe enough time to shower and grab a quick bite at the main building/satellite lounge (the satellite lounge is under renovation until late-Jan 2018). Don't know where you'll be departing from KUL, but most 737 regional flights depart from the main building whereas most wide body (333/380) departs from the satellite building. QR will arrive at the satellite building. Hope this helps