Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5f7726a035477cb97f0ef67cfed892d9e491578a1291ec8947cb1d1edaf75dca' 
  AND token = 'ZUaBslyUgN6fRgBMHq1pca4UYM+YYddYZuhSFzMut00=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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