Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8000c892536a9a31cf7a3bb6a15f8b52d7e8cf0019bacd97a3b23561671597a8' 
  AND token = 'ROfaJUX1UQ5xtXl411U4bj6H3l0wGV4Y6Avsd+51tHM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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