Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '801c54e389bfd7adb4e3abd3db5f8424e3ec5aedb377022acd08f124b260aea1' 
  AND token = 'wSurwHWf3QCi6mevMYUQxt/S4JfAepvudhbPuOBTLGo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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