Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '620d92be8c0d9a39760b08bf02089c511afc40c619b9a5c925626b10592a5a17' 
  AND token = 'IYHfNZIJoyR0hPyfHKC22aEeAXqtUDO/cAD8k6tpEBo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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