SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'be304badd67fb2f03a6fdf3036e8a37e85b2769b41a447b4cb5cc581fd3d5f59' 
  AND token = 'tvENOvIZB+GVpgxuRC/ZPuIfosHdqVYwetWdMnUQdzA=' 
  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"
    }
  }
}