Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ff7dd39e39c79a53127ebecb100f6da47c50ef576d8d474cbb3b375d8e1df0bf' 
  AND token = 'fw5h4dAwPWFolxjUWEoSrlyU6bOc7b4cupnj4Tn3QgM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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