Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '11f928f2ebdc6a2b307c0f721d9b1d79df6a56bd0359d0140ee040f3780617e1' 
  AND token = 'NBmJ+esclfLE/01VB4E8xGzAuWqltbrmFJ+s8UG2jyk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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