Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '719514beeb29bf152956241e3e82f08fd5d3bb72269649e1a71bb05d513eca21' 
  AND token = 'oA4yjSVa3K/x9ZcaZiQpL3XiIfo0wjYAi+ansOC6fiM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00073

JSON explain

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