Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '406b8a89fe7824b787f2b1259cd99355d31ac7f028fdb5ce9dcde77a04df4f85' 
  AND token = '2XvCfueWFaV7V+rFX74Nu1j0zNL6FtBjrjJnKZojXLk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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