Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bbcb4ffbb82de7545faa23caff9be25392680e52c2adb4f320d26245c625865a' 
  AND token = 'QnMG+EDjcc9JJBMLG/PtKFyWsHBP5CGAjGKG6CQt/Fg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

JSON explain

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