Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '648d0fa6aeae58f8e922bd4b9aee849a2ea1b50ed2575c6a620e7d67797cbdb9' 
  AND token = '54a8gvDf+mEp0cTQR6ORaXxqF9QRVW34j2UTDuMY0qA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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