As per your location , try south delights and dosa co.
Karantaka Food Centre in RK Puram Opens at 8 AM. I absolutely love the Panchtara Uthappam over here.
There are plenty of them, you just have to find which one is nearest to you. Some of my suggestions are:
1. Naivedyam، HKV (opens at 10)
2. Sarvana Bhawan, CP (opens at 8 am)
3. Sagar Ratna, CP (opens at 8 am)
4. Karnataka Food Center, RK Puram ( opens at 8 am)
There are quite a few in CP. I am not too sure about timings tho, you can check it on interent
Dosa point ,katwaria sarai , New Delhi
Very less chances of any cart to be open in this COVID19 period.