Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2cc04b4195017c56b7fed52c63e0603765748f1300a1227a20167ac9c0d71b4c' 
  AND token = 'IckaE8UwnhBuHu1lA2BZuZNVLa/mWicfdul5JcfgKp8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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