If you have a graduation degree in any stream, then you are eligible for the course of LLB course. As you have completed the course of MBA then also you are eligible for the course of LLB. In most of the universities, it is required that the student need to secure atleast 55% marks in there UG course in order to be eligible for the LLB course. As you have 58% marks, that way you are also eligible. Also there is no age limit for the course of LLB.

For more information regarding LLB consider the link provided below:

https://www.careers360.com/courses/llb-bachelor-of-legislative-law

I hope this helps. Wish you a great day!