Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '992a316cd2d38ebf2d8153b24e36cab73ef7b559a5fe7b994f8f58e4b50348b7' 
  AND token = 'WpatNloLkVq2LN026ED8ARIWB6Pp/t5yxVDgB65eq8g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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