Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '561dea46e052a47eb1b3660fc3f5c3fd0a60ddbb0f4fa9ebc57a738c17b396f1' 
  AND token = 'keXhf/ve2JsppHJT9MHyZLQXxpoc4AOMTWvhu73g22k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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