Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fc070be063f02e418233fd49e24a2b1a75c7d60a00993a476f4cd28d8e547cee' 
  AND token = 'HFa3koUhFstSixx0rv0EtmZe3RFHNO/SW/x70/E1vz0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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