SELECT 
  rule 
FROM 
  cscart_cp_seo_index_rules 
WHERE 
  dispatch = 'categories.view'

Query time 0.00022

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "cscart_cp_seo_index_rules",
      "access_type": "ALL",
      "rows": 11,
      "filtered": 100,
      "attached_condition": "cscart_cp_seo_index_rules.dispatch = 'categories.view'"
    }
  }
}