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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '34eda8aef8bf48131fa77583277311c110cebdb2c3f58e3cc7a458c8c757e9bb' 
  AND token = 'NhlMYA+IHvoyutmAQRAfz/n7AREFgdGs0Dt9NzSanws=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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