Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c1fa60a6c4628da054ab556ead475606a7e11b5a95d45f4ca8f32d7162abdfe1' 
  AND token = 'v6Nia3kuJ7BaurJ7C52PL71Y0o7ed4UhvkDgZ+vw2cs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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