Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b479bc553906fc379d14cdada1bcb125fea47c0836a4e3ecc9441d6cf3dd9fef' 
  AND token = 'ilRMcLr80HVUipXOjSYejzoO2BsVUiV1O4uFuIoHdgo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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