Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a33e47266e0a71bb2a784c3693f8afb63559ba930ec9aea105c54144cbcdb7c4' 
  AND token = 'CUC6HhrxwCe3wckRv0ht9QcSIFrNOq5ZZ1mbRm72nck=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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