Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5f7c792986371322ad1cf3496a3b1caa2241818c993df4f48ef9b30140ec0df4' 
  AND token = 'jhLWOuAG1Ut2UkusdNT/b3F0Co4tLJQFzAFUJCYZ39o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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