Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e81ac62008a0a3d15104698d27c4d74f89fe3de8a56b9487843eccf26dfc182d' 
  AND token = 'qZyHyFbn4RC6H5ZhtKnERHtSu/iTvOr6Eixl8f7+JMw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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