Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c140ca07ac1c0145c9bad8725793bcde9d4d3ce6a8ffb9b98abfbb10d5a161de' 
  AND token = 'hsf/Sl6Fwx6w1QclaNF4HV3CZxMrgMg4ZzlMc5w043E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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