Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bc987ec052592e544e01e56110505024d898f681501aafa544f9268f2f60195a' 
  AND token = 'DzS/WKUYK/vJy7cAM4rIB4urDRmhaemeGJNIocb64o0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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