Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0e45a7458fdcd2a80dcc7f12ab4ad44c6cb656eb8bf24448cf1b9ba54c28e9b7' 
  AND token = '8mWeDrWUTUO08yux6yahSl92sa2GJdHQcJTkPrwg8fs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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