Sandbox

SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'ba02b557eaaa344d2133498dd93f7950496c779d3885276023110ee26614e595' 
  AND token = '5Bk6gcIYun1KgqVXs7ptrcId80XjNEkKLS2Ua6PU19U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00012

JSON explain

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