Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c0a85f1e7c4fab81368a21dd5e494cb1da014b53dfeb67c107167254240873ba' 
  AND token = 'OEljq0W1NzOWro3lPU1jSkI539rkAJIsyOLX0WpkDc0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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