Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8336c5b46c2ca8dc90212ba013c6ee5cc127365f3d93c33849669f5869c0cb20' 
  AND token = 'ubnXk7Yg2dz+uu++IA4yxfdkZzBlZ6E6uaFjiA1Smlc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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