Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b8e5de302a537106d33a5ac9b5503b197f5b72d0405e9ea326b645ed66a3a33e' 
  AND token = 'HYTVdwROKH7x060pC0XGfggXVsbVsAuAae0STdIyPyY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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