I have never before heard the phrase time point—so I don't understand what you mean when you say right now has that meaning but currently doesn't. I have heard the phrase point in time, but there is no difference in its applicability between right now and currently, which are synonymous.
Also, time frame can encompass a second or a thousand years.
To describe a short period of time (if you don't use those actual words), you need to use an adjective such as momentary or one of its synonyms.
[Merriam-Webster]
1 a : continuing only a moment : FLEETING
1 b : having a very brief life
However, I should also say that neither momentary nor any of its synonyms means right now or currently. Something that is happening at the moment is something that could have been happening for years in the past and could continue to happen for years in the future. The fact that you are describing something in the present with those words doesn't say anything about its longevity. (Unlike momentary, which does.)