MySQL: Fixing Unique key constraint violation

Question

I have a database with an unique key constraint.

When I import this database from a dump created by mysqldump I get

'14698-3' for key 'UNQ_CATALOGS EARCH_FULLTEXT_PRODUCT_ID_STORE_ID'

But when I check the database where the export was generated, the constraint violation is not visible:

mysql> select count(*) from catalogsearch_fulltext where product_id = 14698 and store_id = 3;
+----------+
| count(*) |
+----------+
|        1 |
+----------+

I suppose that MySQL does not show the second entry, because it uses the index.

How can I show this entry and fix it easily on the live system?