Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '462c1ed87c2048599f398a6b38c99bd73c0fa79490448923daa71da486d103e7' 
  AND token = 'GpRvOSo+Fu+AlWKzZfwne3Q6+tEWIKhp64XUFTr0kf8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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