SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '134abd712e465ab44c9d635b6ceb81dd916bc46c32b1f433c9fca1e20ed1dba9' 
  AND token = 'IakTLOmxoFiUtYnzwuUPnN/PvqOn/JIR+ifZCRHrjws=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}