Notwithstanding the provisions of section 334.01, a financial institution may, in the case of a loan or forbearance of money, goods, or things in action, secured by a savings or time deposit account owned by the borrower, charge interest at a rate of not more than the greater of two percent in excess of the rate of interest payable on the savings or time deposit account or the contracted rate authorized in section 334.01, subdivision 1. For purposes of this section, “financial institution” means a bank, savings bank, trust company, mutual savings bank, or savings association organized under the laws of this state or the United States and having its main office in this state.