SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '44f2727f04c677c1472b94661571fdba4f484baedcd235500bc6db99ec605e18' 
  AND token = 'i4ibvYwqZEFIo9yzvQE7gR/KrBIakaIzABJglD3HY7s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00008

JSON explain

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