Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fd4388edb384fb2999dd536847cd8a7312d2ce243eab9d2e7c2266ad8c4c13fb' 
  AND token = 'UEifcBPWAuDg5AKTUDHXV7q8Ix8SSo7TRwXQt6Eocbg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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