Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '89aadf6d204fa1f45354c0e54930da1e7cec76a1744332f25ba30c2bdebb095e' 
  AND token = 'XRjPK2oUFm75taxcGk21SQUK1xeIye78zlO2uhmc+dw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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