SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '31fb915d63397e4c6c15fd83469891713026bed740edc096234348940f05fc91' 
  AND token = 'J0FEXwonIem3ohRRkgIHYVQIFx+z1j/5EBgucMSyLHQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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