Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f1ac2d16a607c0baa290cc1d5a944b62398cb0783d0a7a6da6871848b59834cd' 
  AND token = '9V60h9Kaz0sGtZHApq4o+a56kUlrTH85ELvfKhiX+n4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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