Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '94fc2315dc2a5b2cd049078db93a265e08c71373cbfb7273fbf0098cdc3d4858' 
  AND token = '+U1z6h5VxOZRGKUuy7ekjj3EeVMj6z6Rk8Ke6QIzoz0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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