Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '48f94b82542e9d83d90eda55f4de13d400b3bf0eae7a74e67f7ad04c3cc200ca' 
  AND token = 'viOh0yjEifAwSchqcQMqiMB53i2KgathbxKLF/HIHyM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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