Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '42012e327746eb58b6ee0c51361e9d7e40d317c7a18dd9a46e536ccd01cbda86' 
  AND token = '+S53YP++sW/pY556gOOuCJ1NoNFym/FhSTEP1X8dt0w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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