Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '07abb78524c539abae3405aed6f56e3ff1fdfed8070aefaeda569298b7da71e4' 
  AND token = 'PXnK7hxinRyko/c8TzGO0jNnP2lTpPMsjUewVKCGY0s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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