Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '20d127dea0280643380977100e63cbf47e609c14dc79b17cb3dcafff70f7efd2' 
  AND token = 'tW0N8VK/u49ooC8hbPXU/0m3VxkjDViRaaUpNo/ZCj8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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