Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ccd3927c75d7d9b7133ef5072b871b70ea72c83ee0fab6fed7cd1c64723b2650' 
  AND token = '8mr5CSrU0qkmKPARb6dY4hBh7e/aXI9UMQoA0aF2w7g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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