id                               select_type                      table                            type                             possible_keys                       key                              key_len                          ref                              rows                             Extra                            
1                                SIMPLE                           cnc                              ref                              PRIMARY,note_id,category_id         category_id                      4                                const                            5096                             Using index                      
1                                SIMPLE                           cnn                              eq_ref                           PRIMARY,result_id,active,created_at PRIMARY                          4                                kernel.cnc.note_id               1                                Using where                      
1                                SIMPLE                           cnrr                             eq_ref                           PRIMARY                             PRIMARY                          4                                kernel.cnn.result_id             1                                Using index