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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5ede3f75d299a9c23b705e6efb8e221b8303086c60b35eb50343b492e9e8411c' 
  AND token = 'U22sKzb0qvFbp3stjL0XiFGNPrL5F6UUTafwu7V8YlQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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