Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dc2d5c460e82270dabf1058a3a95c8c2a9fe73e5bc7f3f96198897820dd04125' 
  AND token = '9IC8CecBkWjQS0Ccu+ZapxBSrVU1Zl/JFx1LWoRwXNY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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