Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4b0a1b143d0677b8d879bb3c6c17b8204e268545e860081c5e6471bf92664d50' 
  AND token = 'Aivcr9OVnzz6irulYxNodMhCIQdd2f+/Der5blRjW28=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00057

JSON explain

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