Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '46e74b7ca4ac5829db24eb2421156f955edd524e242038f1f4afb50f0b1a3353' 
  AND token = 'rwWDwClyIdkJovrP0BvETic8FKmYPzhGcpMm9c5SpQs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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