Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1eb9cd5252f24f7d15d9a3ec6b9508736ec50eeccb926a9eb67b055a039ae7c2' 
  AND token = '6csETEptHzk9FWXdz2H4pcg2f5jTyWnYoazXMr/RAL0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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