Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4b1faf96377836431443e68358547b20c885533ee21fb9a168df07358361f523' 
  AND token = 'OH91S/S/+9CDjWMMttm9n92zVLbh0ZODieMb6l71llY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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