Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7da38eb4ab15575ad0b93f9ec57e20b40dd63d840b55cbaa6422fa0d05ec9c9a' 
  AND token = 'JaoD+UYdNgWwlednccpsne1A8ZiJeh3gmHpseek4XK4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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