Sandbox

SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = '8335d9241f18566ee9c1543e40086cc9ed7745a2d7c1a6102ce7c2fd75340454' 
  AND token = 'oaxeFc6YB9URKDa7wNnAkitsWW6uS1Ul946vf9YP69w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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