Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f44544dd366c0340bcc8ff89af78a837868e784df01646fe8542c2d447c5134e' 
  AND token = 'GVNCOLIigVpnyuMUwBmF4CJNHe3D/gLy4WjFlch5edI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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