SELECT 
  COUNT(*) 
FROM 
  cscart_access_restriction 
WHERE 
  type = 'd' 
  AND status = 'A'

Query time 0.00021

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost": 0.00345856,
    "nested_loop": [
      {
        "table": {
          "table_name": "cscart_access_restriction",
          "access_type": "ref",
          "possible_keys": ["type"],
          "key": "type",
          "key_length": "9",
          "used_key_parts": ["type"],
          "ref": ["const"],
          "loops": 1,
          "rows": 1,
          "cost": 0.00345856,
          "filtered": 100,
          "index_condition": "cscart_access_restriction.`type` = 'd'",
          "attached_condition": "cscart_access_restriction.`status` = 'A'"
        }
      }
    ]
  }
}