SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '24e0d16c224e129996441e6d9b2c8f93657bf5ea4faae2cac1a245cbf497f6ce' 
  AND token = 'LyQl4qhmKEyBSdMCwC1Kxz5BXguW380huL9qgxMVX7U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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