Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '679f9f8b3e6068364339048511f2f7ce4c102d78001c1d75af6f8835590061df' 
  AND token = 'q+eCtxpz/cKWlZ8nkqan7hH5Ap83oXAkuN1e8bCERkU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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