Sandbox

SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = 'd48301e1cbacbb979112077e8480d70e991684c227c85130b5c37761b8fd8820' 
  AND token = 'bPZuNl9aDl49HPKC2ToCSZp0ebLrctIKpUVDgWrciBU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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