Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '99146d6f4a82f3d1a1be805932624c8a38c12eb7785699b234fe5a5fa3db114c' 
  AND token = 'WV6sPeXkx6NYlHqYiapL2KBxnfcXR+flraVc8nWU+s4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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