SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '29679b3f2105117c45a453af55786ed763328f7c918f7caaaeff3f252e8c5e08' 
  AND token = 'VKJY2za6B9t2ZCvS4K1JmNMclq9YVN4L6w9J3FHch4c=' 
  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"
    }
  }
}