Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f7848fd51e72010de1cd858eb40d347fc9595777fc75fc268277259c8ec45cfc' 
  AND token = 'zcaaFdy8gna71B+il3Ntq6ynJpfixu3KV9jXTK6NmS4=' 
  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"
    }
  }
}