Well, I actually don't know whether was it made in late '80s or early '90s but I can play the tune on the piano. The beat is "progressive", kind of calm, but not slow. The tune is played by two different instruments, one is synthesizer, other is probably electric guitar. In the first part of the song, the synthesizer plays the tune and then in the second part of the song, the electric guitar repeats it.

Opened to suggestions :)