@kadsuy
Not so sure of translation for the entire phrase that you asked, but below are some ideas which can help you find the correct words for your tattoo design.
present (time) literally translates to वर्तमान = varthamana in sanskrit. But its a very plain word such as using word "now" or "existing". You can search for synonyms further.
Being present roughly translates to a word सहस्थ pronounced as "sa-ha-stha" in sanskrit. Please note that sanskrit words can have more than one meaning. It can also mean being together.
I read sanskrit in school, sorry I'm not really qualified to give an answer. I tried to reply something Just out of curiosity.
Please keep us posted on how your design turns out at the end. All the best I will let you know if I find any more ideas on this.
