Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8cb4433b9443334c7dce9f4c998a52a99de94802ba608cac2ca505e220381ccf' 
  AND token = 'Im9aNDINO5DZ6VIQ0XGJKwB4qAyYJytJ/lhb9Oz0qGE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}