Short answer. Most likely not. Article 291 of the Labor Code gives money claims arising from an employer-employee relationship three years from the time the cause of action accrued before they are forever barred. At roughly two years since your resignation, a claim for unpaid final pay is very likely still within that three-year window.
What the law says
All money claims arising from employer-employee relations accruing during the effectivity of this Code shall be filed within three (3) years from the time the cause of action accrued; otherwise they shall be forever barred.
Labor Code, Article 291 — Prescription Of Money Claims. Read the full provision →
The rule that governs your deadline
Article 291 says all money claims arising from employer-employee relations accruing during the effectivity of this Code shall be filed within three (3) years from the time the cause of action accrued; otherwise they shall be forever barred. Unpaid final pay is a money claim arising from your employer-employee relationship, so this three-year period is the one that applies to it. The clock runs from when the claim accrued, not from an arbitrary later date, but three years is the length of the window either way. This three-year rule is specific to claims arising from an employer-employee relationship. A dispute with a former employer that does not arise from that relationship — say, an ordinary loan between you personally — would instead follow the Civil Code's own prescriptive periods, not this article.
Where your two years likely places you
Final pay ordinarily becomes due at or shortly after separation from employment, so the cause of action for it typically accrues around that time. If you resigned roughly two years ago and were never paid, you are most likely still within the three-year period Article 291 sets, since two years is less than three. The article does not, however, guarantee that every possible accrual date works out this way for every claim, so it is worth confirming the exact date your final pay became due rather than assuming.
What happens if the period actually runs out
Article 291's consequence for missing the three years is stated in absolute terms: the claim is forever barred. This is not a period that can quietly be extended just because the underlying facts are otherwise clear-cut, so the practical weight of the article falls on filing before the three years lapse, not on how strong the claim is on the merits.
What to do given where you stand
Since you appear to still be within the window, the immediate priority is not to let more time pass. Gather whatever documents you have showing your resignation date, your final salary, and any amounts still owed, and pursue the claim while Article 291's three-year period is still running rather than treating "over two years" as though it were already too late.