Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c68704e28226cbe0f60c7f25454237cb880fca6c9d334bfdbdbd4fc04650f88a' 
  AND token = 'f14Py/MbBa9/KUNymRJ7SML4tzOGuPa0RQDwUnzk/ng=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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