Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '67c9f79da5fc9b04f4e1a03451bc1afb1dcf0179c686e149d505757687b0a4f3' 
  AND token = 'QLx0Z3olp/9H28GALEhGrkgEOPtrpMBrCk7dDs5B1xU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}