Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cdd6701f6401712a0f198ea633a0d40bc4816cc008f3fda7cce0d47055076468' 
  AND token = 'RC1KDkRjnWmo5zk6jrE6ZNvPRUVs6xa+GrmoAUygSso=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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