It would be very difficult to get food in late hours of night.
It is very difficult to get food in late hours of night.
I'm not sure what you are trying to show with these sentences. There's a difference between the verbs: 'would' suggests possibility or a plan, whereas 'is' suggests a real situation. In you examples, the first one suggests that you're thinking of ordering food right now; the second one seems to be a general statement.