Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fc43b82609e0177d1fb0de5a9dd49a03876cbb07e633cb1e520729f176dec952' 
  AND token = '3v/RrE0JKDGB/QjfLRzJT4/n8O3GMgtpW7ILWnyejEY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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