Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '252ebb1fc173e6026050326865484c222ce09b569afe73b55ff271a8e4705e9f' 
  AND token = 'X6S2Na7eyJReBlUq/lFyjRmRqIz4MqJqlcGHwVyulzk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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