Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '280f5e14fb77aec21f859a68562cb8b4cd6ac159cf99e2394905790363ecc17d' 
  AND token = '2D+LW+KsYNs5Ljck069K8aA6ZrFsM2Sl11ItUGetx7Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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