Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f97359f50afda5caadd31babeff30cad7a632ae4343a20574a6ff477230feefa' 
  AND token = 'REO6VenXkZjAyf+CPAOKb0WdgUrZtcuCoVjouGXhJTI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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