Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c10d9d4fc073c3b4626566dd92c70895bb536ebef0c00625fdb429d5a14b8c48' 
  AND token = 'XnX/as9VXRu9thqpE+1PDGINpNuJ9QL5ty8cvQsZivY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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