Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bbd2d853dca76047a15e2abdb7ca784319f6316d871bdedc15572a6b311524ca' 
  AND token = 'RrowVNyFzxUoR6HqKX5EuOHR2zNnoWGFroKFUQo5XNA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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