SELECT 
  *, 
  IFNULL(
    ab__emd_cp.category_pattern_id, 
    0
  ) as ab__emd__category_pattern_id, 
  IFNULL(
    ab__emd_cp.products_pattern_id, 
    0
  ) as ab__emd__products_pattern_id 
FROM 
  tmall_categories 
  LEFT JOIN tmall_category_descriptions ON tmall_category_descriptions.category_id = tmall_categories.category_id 
  AND tmall_category_descriptions.lang_code = 'en' 
  LEFT JOIN tmall_ab__emd_categories_patterns AS ab__emd_cp ON ab__emd_cp.category_id = tmall_categories.category_id 
WHERE 
  tmall_categories.category_id = 212 
  AND (
    tmall_categories.usergroup_ids = '' 
    OR FIND_IN_SET(
      0, tmall_categories.usergroup_ids
    ) 
    OR FIND_IN_SET(
      1, tmall_categories.usergroup_ids
    )
  )

Query time 0.00996

JSON explain

{
  "query_block": {
    "select_id": 1,
    "const_condition": "1",
    "nested_loop": [
      {
        "table": {
          "table_name": "tmall_categories",
          "access_type": "const",
          "possible_keys": ["PRIMARY", "c_status", "p_category_id"],
          "key": "PRIMARY",
          "key_length": "3",
          "used_key_parts": ["category_id"],
          "ref": ["const"],
          "rows": 1,
          "filtered": 100
        }
      },
      {
        "table": {
          "table_name": "tmall_category_descriptions",
          "access_type": "const",
          "possible_keys": ["PRIMARY"],
          "key": "PRIMARY",
          "key_length": "9",
          "used_key_parts": ["category_id", "lang_code"],
          "ref": ["const", "const"],
          "rows": 1,
          "filtered": 100
        }
      },
      {
        "table": {
          "table_name": "ab__emd_cp",
          "access_type": "const",
          "possible_keys": ["PRIMARY"],
          "key": "PRIMARY",
          "key_length": "3",
          "used_key_parts": ["category_id"],
          "ref": ["const"],
          "rows": 1,
          "filtered": 100,
          "unique_row_not_found": true
        }
      }
    ]
  }
}