Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '53684cd6635adf53ded45122e8c2fe8305f21f431eddce915383f2305869b415' 
  AND token = 'XGHhtL7sSzaGi7++p6RmUJ6T76D3nA8ycrAVF007mS0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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