Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '93684fe4ac9c73c6b958cb380ce5b64acc0a4bf7b94dd45de802d9dd29b9c33a' 
  AND token = 'uUfDjZkVa+pnKxpSN1U8f7c0P9OzOy6M8t+7Y6Gs7qQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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