Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '58db4b04c85647ee067d7382d12855f86f074dc4a9dcd66fdae10ed90b8254b0' 
  AND token = '/rpcz4PJ3iY6llJ7FUvDSv3cwIfFJErskR2bNa2/O2g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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