mysql ERROR 1205: 1205: Lock wait timeout exceeded; try restarting transaction - mysql

Question

I am trying to update a row on a specific table of my database.
UPDATE `Search`.`credentials` SET `status`='0' WHERE `id`='30';
and i am getting the error
ERROR 1205: 1205: Lock wait timeout exceeded; try restarting transaction
SQL Statement: UPDATE `Search`.`credentials` SET `status`='0' WHERE `id`='30'
I have set the timeout to 200
show variables like 'innodb_lock_wait_timeout';
+----------------------------------+-------+
| Variable_name | Value|
+----------------------------------+-------+
| innodb_lock_wait_timeout | 50 |
+----------------------------------+-------+
The database is been used, but not all the time, and not the table I want to update
mysql> show open tables where in_use>0;
+-----------+---------------------------+--------+--------------------+ |Database| Table
| In_use | Name_locked |
+-----------+---------------------------+--------+--------------------+ | db1 | PayInformation
|2
|
0
| | db1 | KeyMapping
| 4 |
0
| | db1 | NoticeInformation
| 2
|
0
| | Search |
companies
| 1 |
0
| | db1 |
ContractInformation | 5
|
0
|
+----------+---------------------------+--------+---------------------+
some times there are more lines concerning the Search database, but none that is using the same table that i need to update.
and from the process list i get
mysql> SELECT * FROM INFORMATION_SCHEMA.PROCESSLIST where db="afmSearch";
+----+------+-------------+--------+---------+------+-------+------+ | ID | USER | HOST
| DB |
COMMAND | TIME | STATE |
INFO |
+----+------+-------------+--------+---------+------+-------+------+ | xx | me | my.ip:44604
| Search | Sleep
| 1 |
| NULL |
+----+------+-------------+--------+---------+------+-------+------+
Any ideas?