Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ddd1c29e70ae3cd6265d688326b1c34d119d241bd2d3522bda0d99e03b8484d3' 
  AND token = '/mIxMzxF1yaz+MxYgoVpcIkcyN0LKRtyzKcj4+6swiY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}