Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8e692d21366321b298e5baec353ce42b74650c8910a94260f3a56169a3b5ed8a' 
  AND token = 'oDGG6XyPesjJzS3OYy8SUbr5sBUm4uQ85VzYZECmDVU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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