Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8fdac33ae46f2fd3e07fb8e3c69f727fc66ec96db9db78f90af76ef82ffad992' 
  AND token = 'uFtprlqbTj9QzfMjGmlpIJtuHSC6rGEAygp4g2i8KSk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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