Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cbf03a7d9a02659cd97db08d36fee4fc0298da12fa3dbd111b64fc15da7c1f3e' 
  AND token = 'jx5PDfuCOkDIJsA5yYUPwE28VSluRhL49rhTyD4YQys=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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