Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '006c1ff77cbf3eecb640e0e3f3c93f74b977db86b96e1086968caf444aa108c0' 
  AND token = 'Z+e0W+a2w+YpPlLrHcLtmc9EzPyD+KYDH0dlFxZwSq0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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