Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '62de92e149661c02c950e853d9438656ec5f6290a65ee644b44003d3ef9457a1' 
  AND token = 'VRO8uRSi+yhoPUQEItv1eY/+oOr5RhWfOH9UOun0RIU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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