Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'de0847c86d468f7aeeac73e762d50b40e12b0b31b600ecec3fd96b6d1a8b2283' 
  AND token = 'Gr5snJHnjNcd6yq6Knl8mjSYd6lPVf1hePDkffeLmQI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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