Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '835e67179988fa47c155ccaa57015a197936387b19fc5b11305efa852e6a6e26' 
  AND token = 'bln3u9NR8pATp/sOfKgJOyYjYgjittTrTWsHQGDn3jA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00065

JSON explain

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