Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ef193fbbd6069ed05e09ed848888f53956ba245124f3db5f9109571a4fd20c09' 
  AND token = '8S7odltpaTiy+/cqYRM0cmr1tp3HcrWCfU5fnmzNrAE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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