Sandbox

SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '1d9d0ae78a21f152462a6146c4249f94a46fe4463ecf0c78ad3aac687bdd220d' 
  AND token = '7tTg+uQUcZScv3o85eLOcsESQ/5QD5VnpIre9O74m3I=' 
  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"
    }
  }
}