Sandbox

SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = 'a9dec2cd6e29eafafca9b96b61c01f64bd70cccd8167d3ac4baf1203fabf3226' 
  AND token = 'BEW1cFNOdnrr1Lyt5g2l+W5sCPKjHu2XShCFi4brT20=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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