Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd09887a3efc36ebc784af5301bb792b8223265e9d9ae9e6c2434db49218e52eb' 
  AND token = 'BjxrBwxnlqy0lyjWxYbkZkd7Ql/JEIGxkuuMekP706s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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