SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '8fe9f45e2cc6d02fc3e18cb323691f027d9828b7dbcdad78f71d4510c25a7345' 
  AND token = 'J4X++Nv/h5kE57vV/XqWo+1QoS9MmguzYpoLWNu8sP4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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