>The generated data would be random with following constraints: The area column would hold six digits area code (any six digits would do, no validation). The age would be any of 5, 10, or 15. The active column is either 0 or 1.

That is about 6 million combinations. This is not such a big space that it would be impractical to precompute all possible combinations. I wonder if hashing in to such a precomputed table might help. Might not if the overhead of maintaining the lookup table is too high.