SELECT 
  COUNT(*) 
FROM 
  cscart_product_options 
WHERE 
  product_id = 716 
  AND status = 'A'

Query time 0.00014

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "cscart_product_options",
      "access_type": "ref",
      "possible_keys": ["c_status"],
      "key": "c_status",
      "key_length": "6",
      "used_key_parts": ["product_id", "status"],
      "ref": ["const", "const"],
      "rows": 1,
      "filtered": 100,
      "attached_condition": "cscart_product_options.`status` = 'A'",
      "using_index": true
    }
  }
}