Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'efb50c8587743262c30a4cebdbd94c23f823f4d0fbd7bd81128b44f6bae4a971' 
  AND token = 'XRjQcis3xAzZKUFEO44FNpd8L+OWIMlmKpOAisuk7fU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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