Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8d9b4823ccf00a5a1932a123fccbf4a16e69e6b72967b430c6c1fccf472db108' 
  AND token = 'KezFc6+2gdPFJwjaxs+XPzh+zon1n+4RwEbT7qIbxgs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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