Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '95aa2c79b3cffdcaf8a562472864d2118adc78cf4c81ee58f2f2a8795624e975' 
  AND token = 'MQeZFqBifwLvZHssyOMnSd/tvEwnO1trButgz6R2nBU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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