Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4bdff124ad98f415032f7adc526ae42962d902c8dd6fa0f60c13b54a289bb24d' 
  AND token = 'BlYAPet7Olj2WWOx50c+kQPBUb4cW6iRXFp+c/TQS1Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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