Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1e1b9267a3ef7ce7c57b1aec1984f8079e0f3d308a7e5e56da7cc2187dbc823c' 
  AND token = 'Ke/RptqzVYcNvfo02dijeX0biil/RpKy1HwZqCx8Xmk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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