Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '7c9e88fe103c6f0f58e1c89fd9b99b2241efb5d82b8e7b759134246e11e4164c' 
  AND token = '2BWdQkScYOwfr87YbgOkUrSVBhBdNsinza1390YCcII=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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