SELECT 
  category_id, 
  parent_id 
FROM 
  cscart_categories 
WHERE 
  parent_id IN(
    913, 383, 273, 274, 370, 912, 296, 914, 
    905, 275, 278, 277, 276, 906, 352
  )

Query time 0.00028

Explain
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE cscart_categories range parent parent 3 22 Using index condition

Result

category_id parent_id
274 273
296 273
275 273
277 273
352 273
383 276
914 276
370 278
873 278
905 278
906 278
913 912