Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '08acacaffa21b3bc9bbb44b1117064a8aa359ef8ed83e9b25268aea6564668fd' 
  AND token = 'aHcol9gak06eQSAL+IgCXzcqG9+Ha/tiiJpY688oQQw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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