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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '2d2d9c420a8555bdb9f863b9b08ab41152dfac2816b0621522ac35554fd24901' 
  AND token = '8mDi7Pmha1rmIewy3x+FG3PwQvBBFWfBSzuT5D8LGMI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00011

JSON explain

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