How to remove FOREIGN KEY constraint between two tables in Mysql?

Question

MySQL

Unable to remove contraints in MariaDB.
1. Check for restrictions:

SHOW CREATE TABLE `patient_patientquestionnaireanswer`;

2. I get a response:

...
PRIMARY KEY (`id`),
KEY `constraint_name_1` (`column_1_id`) USING BTREE,
KEY `constraint_name_2` (`column_2_id`) USING BTREE
) ENGINE=InnoDB AUTO_INCREMENT=330 DEFAULT CHARSET=utf8

3. I also check:

select `CONSTRAINT_NAME`, `TABLE_NAME`, `COLUMN_NAME`, `REFERENCED_TABLE_NAME`, `REFERENCED_COLUMN_NAME`
from INFORMATION_SCHEMA.KEY_COLUMN_USAGE 
where REFERENCED_TABLE_SCHEMA = 'my_db' and TABLE_NAME = 'table_with_contraints';

4. I get two lines in response. From them I take the value of `CONSTRAINT_NAME` and substitute it in the request:

ALTER TABLE `my_db`
    DROP FOREIGN KEY `constraint_name`;

5. I get an error:

Kernel Error: Error( 1091 ) 42000: "Can't DROP FOREIGN KEY `constraint_name`; check that it exists"

Where did I go wrong? How can I remove constraints so that the linked table can be modified?
* All column names or Contraint Key are correct. In the question, I indicated the names for the example.

Answer 1

ALTER TABLE `table_with_contraints`
    DROP FOREIGN KEY `constraint_name`;

Even though the error says constraint_name_1. And maybe constraint_nameit's a column name, not a value.