Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '412853690ffd65f3af7ead2b41f8a184a374749f0aca08ee5bf2673cde842b97' 
  AND token = 'gcchZobaM4c1AHKfqwlvdqeGky60DFZg+zIwn2GNvws=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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