Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a7f48d6420be70d14f5b9a74ab13e23ea26cbe92b97a1be9414322d6d657e40f' 
  AND token = 'hzJbiBZA8ZjRryjr/YsWvHXQEPcCicrk1kRBTbh6aFY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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