SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '66f0dcdd3e6312f01356e27895ef7a27c6a6565f78f5a85ea59a100d324cb5f1' 
  AND token = 'wpr6Y9DwORsVaGXFOZHprkcSOFRHavGR+mVJGZDdg/I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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