Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ab9f9cd9c0b2403e0e66d7b7351f333d3f6c5124c348c8ad185ebcf05f7fd800' 
  AND token = 'VV+zNiDppVFCudiEpxcSS5WgvNSxaMNjaE7G9rXkit8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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