Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '93f95a2a4114ef8eabe45efa4a62e684a5d54b7bc109c5cc2a4de5bc884f7ba4' 
  AND token = 'SPhU9w0Kkm/1eE7OTAAVnpAS8uQYg6ed2v5yujeSuQA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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