Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '11e5382becee3a5a19bfbe0dbc7aa3cb307fe974c3eb67b8ee30b1e84b512cce' 
  AND token = 'umI19pDByGK7LQrY3s9T7q8gmW72/pP302bHYIg7hwI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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