Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '33cb24789f650b73097782e7858e8e75de1b8a5887ecb69f1760061e1b225c67' 
  AND token = '4Fdh9IAn6NOx5PQID43jNo7mav+khv5Zfzr+2NHu258=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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