Hello @Sreelekha,
that is an interesting question. I don't think there is a procedural way to check the license for dataFlux.
Also, DataFlux has several components to be licensed, separately, which one/s are we speaking about?
I would recommend you to have a check on this link, I think it will give you all the info you need. http://support.sas.com/techsup/license/dataflux.html and summarised in http://support.sas.com/resources/papers/dfpower_dmstudio_setinit.pdf
Also, even indirectly, you can see the expiration with proc setinit and check on the dataflux (or Data Management) products in your SAS license. Again, this is not the right and direct way, and not necessarily the actual values, and but just an easy way,