Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3bea61ce3d38df7face6571e1fa896b9ee09fd884f9fcc0cc302c53b118a5aa5' 
  AND token = 'u+BoGuo1SST11wlwIgLWzpQAjRTkMcgr4rafj7sVt6k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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