SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '3571331f0546a1bd77cb631caac2af4cfa48dd9ee69697d3540665fa0121641c' 
  AND token = 'W/q4YaVGDrH3AZxROR9ks67mjgfOP7gBJE+QdirlSsY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00009

JSON explain

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