Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4318839e9526a41bc7dc7c6f7ee1e6b6b9e686558799600f08768a2031eb9937' 
  AND token = 'jahzO5GLKcSWXDe+BqmoBmaUr/zLr2d4HboMC+HtbDc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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