SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '12fa84892043574f4a1c45b97e77b4555b02476e9fcce6af1c94ad43da2222ab' 
  AND token = 'qs5w9pAnt/hI8EaYif8ckJJHGOG9YjwToxKuPiHEimg=' 
  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"
    }
  }
}