Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '0702b861aeab5c18e2abd9ba2adc23cf745f503b8adc12b739bcc84cc5f1dff8' 
  AND token = 'vJfWGzsbqFedTfppSmh2QWX+jJL06d4MteieF2o0lr8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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