Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '03a43bdbaa30db2308539ce28ab6399f2582c591d682d7166571984a783c7dc4' 
  AND token = '2acQdrZ1bv0eHf+ebEpw4ZyiGroIHH/akLMnRaK23YI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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