SELECT 
  * 
FROM 
  cscart_user_profiles 
WHERE 
  user_id = 89 
  AND profile_type = 'P'

Query time 0.00066

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "cscart_user_profiles",
      "access_type": "ref",
      "possible_keys": ["uid_p", "profile_type"],
      "key": "uid_p",
      "key_length": "6",
      "used_key_parts": ["user_id", "profile_type"],
      "ref": ["const", "const"],
      "rows": 1,
      "filtered": 100,
      "index_condition": "cscart_user_profiles.profile_type = 'P'"
    }
  }
}