Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '349f1a1268e49afde83a2f38bc5e426b983cea8401d664994b71cbec1898fd4b' 
  AND token = '8hOwbGpLRV1pVYIbLjQbIpzJFzGrkeBPaUI3xw+tT+A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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