If the charge relates to a criminal offence and
- If the charge is in the Crimes Act - there is no time limitation.
- If the charge is a summary offence - they must charge you within 12 months .
You said you have already been charged, but it sounds like the charge was never listed for trial. In Victoria the prosecution has 12 months to get you to court. Not sure what the limit is in QLD.
However the prosecution may have discontinued the case which means they can re-start it at any time in the future if the charge is indictable.
Is it possible the trial was held without you knowing (e.g. did you go into hiding)? In which case there may be an outstanding warrant for your arrest.
Not sure it is a good idea making any enquiries at the court or police about your question!