Sandbox

SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '3f2d58a90067b9812fafdb1ab03b5d957a986a6212a7e5e91822134a5acdef8c' 
  AND token = 'rUewBGFta6AcUsHS+sZfDhOdULUcUrC5hN+ZiX+pCbQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00008

JSON explain

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