Sandbox

SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = '4ba8854e467ea42258b730a2269f70ac74ac9bd1b777c7a911cbbbe8ef468fda' 
  AND token = 'SHhMpz5JxBYRQb9eztOHNH4TTqO4+2Wq852rwoD+Kok=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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