Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c1de14838977168b044371613977b39d857beb31176c05c141000836328b960c' 
  AND token = '+d3XgAjO/VORsaj4l4e9w1B1Xe5uFtwHXqieil3dXlo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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