SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '3b0e07b182ad7bfbc91f84f7642e5b63f85129c4a91460f8383c2fcf3cada415' 
  AND token = 'jG1jto7Qn9mCHKMTo5xXPvoYDEzz7WCTsSqxT2+rS/o=' 
  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"
    }
  }
}