Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a24b274f829b05e99782b02d4bfd8c5325d2f13cc2e0b304aff9c2bbc43e78cd' 
  AND token = 'EceYhJ7D/v2LszGjCzsEy2/EIFDWZ0YAqFUrZ1bC/PE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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