Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f500bc85b580e5e9e208ddd456ce8d466f72291f823167d3fa66aa28d082d7d2' 
  AND token = 'vhJAtEbs6U5fL4PLTFZ0+6zbokeazxzCB4EtRthYQuI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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