Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '13197d5a3b7a69abc3b19f4aae84d52cceec27a0df0a3e8cf01adc8d6b8ac7b7' 
  AND token = 'Ai1HWGZVMQmOiE9fjo5KeSD9Kmh4fvCoSxQ0RKl7cos=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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