Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7bd9d793c6ae59f1115054e15f9e6714d3de50467cde5fd805c1ad0e522b14a4' 
  AND token = 'xLrnCnh7Wsdb1SloAxgUXZISyocXLL1qO2jAhfw2h4Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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