Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4d6079a47a4fa9b504a9e9379e4bcc50bb7d5f63e9efce305ee1b34b8024e836' 
  AND token = 'LeJLZH0JaJt23l9ap1fNrrb+UuMj5ygCvavgZc7tKaU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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