SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1b2952a2dc695b8f04146f55c0877799fbd9dd4f7cc85f419293d40c65cc1079' 
  AND token = 'tJSAjSVYpRa6xtzVWMKSuRAcv6dqvY2C++KPQzJz138=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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