SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '184e6f526bbf27d38dac62608fff48f85b482d81213d89f04c858b1932908b55' 
  AND token = 'uKP4cHGc1+PoOFn3BBpCtIWr64VvhkXdwWaRSGoPAg4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00009

JSON explain

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