Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bea8493cab4e8b5491f30de149ed22b5c8f19a228c402b41b7cffa109e4d22d3' 
  AND token = '7pfA3a9zAjUSvM7sJslfYu1OxgrTYtC0d+Mrfq9v9Qw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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