SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '44ca861dfd1553cf138a9bd3706c865b96e390a2ca543526592992b4c4bae8dc' 
  AND token = 'kNzjJWKzIau9sqqhWkic/bhfdnJvaTJLFJuX5GmCYZk=' 
  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"
    }
  }
}