Have an opportunity to take an Agile course in an MBA and continue to Scrum master later. Coming back to my firm later on - agile is a mystery to me, so I don't know if that will be useful considering I intend to stay with consulting for next 3 years and then likely go to LS industry. Thoughts?

The most important thing you need to know about agile is that everyone implements their own flavour based on how much they can be bothered to force through a cultural shift. At a high level it's basically do things in small chunks and that's good enough for most. At its purest form you're going to spend a year arguing about what goes into each artefact until everyone is on the same page. Understandably most people can't be bothered about the latter.

As a techie, I would suggest learning enough about agile to give a presentation on it and to understand the implications of using it on a project. Otherwise, stay away. Trust me.

OP, are you interested in digital product management? If so, then learning about agile isn't a horrible thing..

OP, you can sign up for these trainings and be certified after you return. Take the time during your MBA to explore other interests.

If you intend to stay with consulting, knowing the ins and outs of agile will help you identify opportunities for your clients to mature in their adoption of agile.