Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f30f6aae56f86382b98f0dd565edbaf02599af7f3363f41287fa02e1e02272b6' 
  AND token = 'ABzaHW9+fs03tOBT7BmKOq7YQdad/cFDoEDDkRD/HxI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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