Indeed, when I want to do a "quick call" to get pointers on something, or to clarify possible implications of technical choices I'll always send a message on a platform / channel that can be muted with some text like "i need your input on X, give me a call when it suits". That way the callee can chose to mute and/or choose a time that doesn't interrupt their workflow, but also give them the opportunity to contemplate the issue. This way the other person is in the right frame of mind to get to the meat of the issue, get a quicker call, and most importantly get the right direction / decision without hampering productivity.