Sandbox

SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'df0e6b9fedd4b5aa30a130891a34b438fa87f91dce835990eccf150c5e75c9c1' 
  AND token = 'J+29U6LyVEOKZNpS1ZXmz3eVu0u+Fp4w9v5lfybnB4w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00012

JSON explain

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