Lower the resolution, and then scan again. Scanning may take longer time at high resolutions.
You may be able to reduce the scanning speed depending on the image adjustment features in Epson Scan 2.
Click Settings in the Epson ScanSmart window > Scanner Settings tab > Scan Settings.
If Quiet Mode is enabled in Epson Scan 2, the scanning speed may be reduced.
Click the button in Epson Scan 2, select the Scan tab, and clear Quiet Mode.