Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4b8b0a4bd3c93901069a8df491a7a6a27f5edfd3e4797700e7051e377b8f18c4' 
  AND token = 'P500BxVPERYrjbp1eBqPohiwpZA5exjGyIvAmidDol0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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