Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1a92a31c32112f171f021ff926d481a0441defcae62e89dbfb2e45b36fad30f0' 
  AND token = 'XiHPeQJnGo8CrvsFx9QdSSrnci0LCdB/xMi9MpyEaNs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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