SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'e5739eb522cd2f9d658ca1b1b838f89488816cb490185f2b769ca21f894dfcd5' 
  AND token = 'WxulKD/x6pgKUI/6suiA0UtmApw0qkyRCg67ZfOjRog=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00011

JSON explain

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