Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd5868a6eb47ec894174bd4c59b14bdb3d14a095a5295424ef99aa568b9da3260' 
  AND token = '2CFgArEM0a20xMyjKfWDffZ287xlfM4A2WOCC+/Uv6U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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