Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8f4fcb13c60c64abfed1a2dbf89994002b35b6a84e8696c0e306c3a11f87872a' 
  AND token = 'GdA94VDbQkypobiMJALmHHsRKPuvIb99U/AE1yDb5UY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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