Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '73da18d655bd4d1277b8a14e2e7cf3bb8e37b16ca272c24744db0b91bb707d2f' 
  AND token = 'dtkRQhxOu011hk7F2CrBononCQyKRf1aJ5NiklEToOM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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