Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8c35c310c16f98f0296c9c82cef769caecf88cbf76f0b1d43a8dee4c128b6f76' 
  AND token = 'ed6IJ7SAV3SC7418NyBq4edsPEE46qE1KMPg5Aj4qoA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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