Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '542ce8488b824b9036db46fa94d8fac13abc55571a3a8b3a97678552bfd5a8b7' 
  AND token = '10ci3V6YmLcgrlKF8LOH7N1o/dhwrV+kve8vy2TAJl8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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