Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eb257674f33257432ba8f86aebcdba6692a64dce8f7e77e399e33300eb034f25' 
  AND token = 'KawZZ/72K11nQ+6+BW1F1RwI+zod2PsvhX9wFRMTilw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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