Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '99832abe70ce384f338a7eb765da48f075fd34e3f5b63de85cef1c81d32f33e1' 
  AND token = 'nRUK3ZIyCXQmfsnhcJ8mVeTbP9npluRi/iAZMfQzjFg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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