Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '90c6bc5a2274f101745a6ab363ab57d1f2d14c482d1e6de76ffb655ec22d54c8' 
  AND token = 'Bs5Wf3Mtd4wcV7cR3D7GtxsiJVowoLVQPYCfUbi1Xb8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}