SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '40f2d479d1b4d64985f7f43c19e4ad95c585e6a8a1103a7e70396f076842dad1' 
  AND token = 'vOAwIzP8p8OyVMY3oTlDfapym/nYD6rWKWU9hZbf+iA=' 
  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"
    }
  }
}