Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7fa299b1bcbad050f541aecbc267668b18c8c82f801e86ef96b37bfff0f2c688' 
  AND token = 'FqRMxfWTUxVbddAGpfmU7H3b/7jc8OPkFQXviq3REv0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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