Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2d6c419d391d30499ae037e5c59273c2c6fc3f21814093a1c8df1b33b19906ed' 
  AND token = 'AXN+PaJj8FHkqlXMqkWLdHtmC+nOFWvPdDxm2zoVF9E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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