Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '44c6f63cbc4b16ac7789d44bb9ac3731e36634bcc420566fa21254051c5bfe8a' 
  AND token = 'cBPbRcFk9e67w+ErHbV+DK6zcTmJY1PkOiIE59LI5fo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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