Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '336d3c6b45ae42b071125767dfdd2acd28a73cabd97820fbd73efe646a0fe077' 
  AND token = 'HUienq8XBrx2pk38C8BdChis6PUo0w4oOjoURvEDkCs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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