Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9338e27def85cb5e33d927f96311ebee627cc616c0e9c50fb694883b718e3d69' 
  AND token = 'wU8MBp/QNxvPm2MNyvHKTCVZUP0RHtlpIyM+sWsHlbk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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