Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '406caa76ecedcf4d036b02e6cc94922052ff6a43e8cc01fc0000bb225f4f3fcb' 
  AND token = 'ITbTu9DBTNbf5c4EWWTYbjcvku7tTcn6fPJL2A/VIqw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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