Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fa757f3c349334a6fb6f9af0ab43396c79f183a0ac340214e8ff341025ee48d5' 
  AND token = 'zBLkHAzMn0Gbslb0XhtS1S3yMDbxTXm4zxVwHFyIZBk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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