Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1f835303a322f859179f00926e55708b156744ee491a21c2a8179308d6886b92' 
  AND token = 'FW6RSaJaHopIIUK8T3DcjzoIy/E3WzIUeD/vIjFsGHc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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