Sandbox

SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '26d7797ed16a94ce38d800058b9531e3e2d3876b75fd6705453475d10d91cf21' 
  AND token = 'tO5tHkVKuysWMPL2Pe5XwH/bgXGi8awmf2Z0hefKf0w=' 
  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"
    }
  }
}