Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '120d3a9c2ea2f35d04fcd57751e8119c3fcc263e98c2bc10cbef81c7dea51b63' 
  AND token = 'YBwNCi5AOV7c8v6cVe/+fYysITF3UMJIPSUINvoj4mU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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