SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '67b44308f9faa357aab60e6776ac871091e78bcf327dce042569b875d80aca10' 
  AND token = 'FsfVu30Pw4GC9FqhW6GPfvkgh9xjGfv19C3JmJUOGrc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00228

JSON explain

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