SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b0adc1fa64e70932b45403c617b8262fb95c2f08c7dc72b53fd9c6184a2b7fd3' 
  AND token = 'qz46HgN48pDy0zE79zDNKZYF3YT4lmmhTC++DK3gwAA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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