Hi @Ivan_Pletnev and any anyone else looking for a check box in their tasks details or in their list view; you could create a single-select field, using the emojis 
and 
, as per below:
And therefore would look like this in List view:
And like this in task details:
You could possibly skip having the empty checkbox as an option, unless you use a rule to set that always by default (whenever a task is added, for example) like this:
Hope this works for you as a workaround until Asana add this feature.