Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '573c487901a45909a363b2e30607f8cae448fd82d0e684f036c7a52fda9a7eeb' 
  AND token = 'YdvjmOTOVzlBsW5Yfi6tQfyAw5zyIfkz7Ut2lMsLilo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00128

JSON explain

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