Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '05577bf671b9a092e131a07978df90459b5ea5c003346b7abe9097c103a09e97' 
  AND token = 'fv7rt08RDeyggzNFYgrpZkXy4oZHgzBnz+IAKE6IyNw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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