1109 - Unknown table 'index' in where clause

select restrict_to_properties,coupon_code,coupon_amount from coupons where coupon_type='F' and coupon_start_date <= now( ) and coupon_expire_date >= now( ) and coupon_expire_date > 0 and coupon_active='Y' and restrict_to_properties=index.php

[XT SQL Error]