Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd17e6e2f6bbd070c97749d9b0b6e8ac20eebf09dcbd13ab35bb87d0015117f50' 
  AND token = 'cnY0gCIDNX/BOV2ddzJRzieFEtNsk2zqE7d8qWc6UEI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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