Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '79a3099608cbb58853059ae2c4a3c415e55435930135e255562a3a17315d258c' 
  AND token = '9V+s+FuamAKOpBtLmJZe3xinqEkv154DcKNjDRgw2CM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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