Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cb6162f699fd5d6a7865582b40f2933588ec3e5ec9ea4ccb3909db7219252e63' 
  AND token = 'FtK15ObY6Hxdvwc++GH9TUyuZtT+/QnV+WcbEns8AsA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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