Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '212345560df43f4722455af9d0e7befc7753ab9bf7cecb732f98cfdcd2abdfa9' 
  AND token = 'DA21TQNQaUgxfTh4adYhJgFHFQS1fmyo1hgDA+fwN/o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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