Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cdb6c9e776dc40ce6adddea7db7396256c1b69a500e89ac22bb50d29adb9660c' 
  AND token = '2eZV2ss46DErB7E3ppZVIzUuuKS740wl4C1xLTtF2nI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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