Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '578fa359cba5ed81ffd3da44a8ff53ca59312066f7981f46e2c87a9eabc146c1' 
  AND token = '0yoSHgKXSs2FZ1CGpuK+kt/rnlKbGGp67NTdKeVJKMI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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