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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '7150e077eba871c31e1f88c24958404c7a5a5010bc3c33de4905abef68b33fe9' 
  AND token = 'qANT895ODmNUVTsGOY5UQrkX6LHgbuMFckXKTp6IYzU=' 
  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"
    }
  }
}