Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7b46c7a8a258185bdf346516ee24f27011261491f5d55a3113800d136d02154d' 
  AND token = '9ZBVsDFg9c5LxQ5pvLg1Y4qpgGkpz3cNosZa7UkinQ4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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