SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '11a6f986e7ba049f50b19438bc5c6fb3f6f2d1790674b4eaff92c42c38c5ab63' 
  AND token = 'hlWU6mpVZbabWEhrkv2GgtcYptmZdXqKqz6vqsg4BJQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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