SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '41fbe0c05f7090554a3b27d234a80d3103c48316408bf24174fd8e2414171db4' 
  AND token = 'pusKwLOzY+5H1FqB6WvuUFMxitAU/XR4uyPxVjzF2TQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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