Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6804d22d1cf700cd1bd19b06ef06cf7ed69e6689543614370101655c6852671d' 
  AND token = 'dJ7LC5KsbZVQVRT9L7WknaB8CAkcYXYXu7mantxSgLM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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