Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'efa76cd17fed4ab14fc7fa3ae43ae582e4e90e028056eca843f01417a8f77a2f' 
  AND token = 'pPY+jgczbplQS1PuF+c2uPJc5xZMrOcEKK2V8LR8BWs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00054

JSON explain

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