Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7e8ccb33b9556c5d5a6b23d53b163e958749a6bc21aa0056260e8e59654a6712' 
  AND token = 'om1hfS2M6FszyI3UqQ0zLGB7k0kpTfcEC8N7tqTEXgY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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