Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9c4f9d22fbd4b6309a5c44fd808a74d08109f7703983a1b14fb67aade2989ab9' 
  AND token = 'CItrukdFc5pTeCH0bpMNzU7w6i9w7BtgYLM+qhiCkvw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00359

JSON explain

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