Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ef1fbe7f05687d91824424f62661f8dca3facc90af4e2d77ef0c15f009bf208a' 
  AND token = 'TpBApF/p0K8hyVeoMhepknc2zPKo0WB6U9UxRKE4+Pw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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