Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c803d500e3981a30fae347d0834a51bd6ee90825206085a89d3d856cd30764ae' 
  AND token = 'Fgddm/tP+KkvsE+MF0LZtx8YVH4ZshedsnoyQVCh2I4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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