Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'af4eae6c06d22d60d9bc690adbf30428b0f72df4a969223be5cd9a01f1e4baec' 
  AND token = 'e8MtJcmAWcklXoOyP88PUppfutgLBjhB3uM/4XEu9WI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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