Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2156595b24ae07a936968708bc9958b0cef0f1f32be697b215bbc2e98e0ee969' 
  AND token = 'FKU85B+IJ77SgQT7vE3aHtikOhJ/emmwOivaWPtQi28=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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