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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '36cf5552f716c4c3c37a3b677192d130f8b606781ceac47152de8f48d4ce2bcb' 
  AND token = 'G0AypXfUyRIGne0Ukzo8O4X7ewr9hrdNCEx4RfQrK3g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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