SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '8bc8454d9cb076abd08320bea75eb9d66c83765cd21af4eacb274e39d96f4501' 
  AND token = 'KYV4Vu+Dn+Zp77HqHnScR+Lr7W48h2W2ACx0zYXIwuU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

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