Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4f0461eac1c5c133e6b4f2d02e95a8d13179a32316675da7fbf838d2198ed135' 
  AND token = 'IvpZKMJKUBJWXVSIhfGbCcbJ3C5e5FjJQJ4Nf29dbZg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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