Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2d636a3e1981482c6aa26a60b6fcc9aad437ee2dced86f122d32c4420c4f2d10' 
  AND token = 'TxzPkcl5kY4MQc194cs5QB3C4Ep9DstPdI2tWSZtz8g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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