SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dbee107f7b69035dc2a72c67bd360b8e41c21c0f085f6f26481e479eb18afaca' 
  AND token = '8Pg+5Pim3L3+CJxshCvsXl1jQYut88+K5UPuwSLrkmY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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