Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'cdd3fc5a717af086cdf34f0a8a0a1fab985a1a1836cd8d85ace1ae2841c008f9' 
  AND token = 'N7SgrQ9h+hDF40ONf34HMZoYkP73JxvJfCxXQCcEf24=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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