SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '7e11ba9c7f3c03f2790cd52324ba37aee59af3625db03566d8c610cd9f5c87c9' 
  AND token = '1CcNoHAYU/vIsvLjCW+BXLFrjoKxVGvBDuKhYMvWn90=' 
  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"
    }
  }
}