Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1f7dd0e1c0261838eb1ef37b05875e0a6133491365e3bff839e9f82d5cf07475' 
  AND token = '28OkIkJLoIyNLeSrAJTsVUHHuDJCXsJc/5tmVCwls/w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

JSON explain

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