Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dae4f8f0f9be99862e09d7747716fde75755b79b5241fd604ee5a0dc49206f97' 
  AND token = 'kR4y3V5BPtDiEfIF+hWUhJuPcn8nq8irXhv1vULRVsk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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