Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '163d2c7a6df8d8b09a376bc3dde1d3877ef48d7194f90184c84defc6cd61ce5f' 
  AND token = 'AjbLZpWejp+HVmHRMRIY0HDNH5R7OjWLfWXtUqxSfpc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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