Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '151dc9b61b460b3743223d48969bd16b6d77d53e53e929dbf5ef65416d7af380' 
  AND token = '5L+MCXcTU101o9IuUmisiEUXqwoEqAUFRTew2n3unSI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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