Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ea3f80297e2e0ed78e86e928b74afbbae8ceed3770785760f234cb29666d8fbf' 
  AND token = 'NUghmIgyS7hHbGJ8lWdURBXvK2xRszFN+UtjUUYD5ow=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}