Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8b145e2374c35e7ebe58557fb8cc738bd8ef4c9ea99952c702545222c1b3e541' 
  AND token = 'V7AhcMcsdW+7CNrAsTJMtA0rE1bN+LHR2nddd0UWi1w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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