Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '698a8ce7f8817d6db84fd1a250a3177d2199a2c13a85894fb1e2ec9312c20d81' 
  AND token = '80/TNZ9vIA2+khY+GtwkOC3bCl60xVcFNsQH0AwEU04=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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