Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e6b0207e9bd18c457d5e2458da72b80bd0fd6e49891553e947f9faa0af034b71' 
  AND token = 'PaKx7qnXF4gIbYbFQSg9gb34zCfbCsGXt13VTzj9g9I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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