SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1c22f17acacd9153c7e565383c8618cd82ada9de57c8be42702af1d8b45b9928' 
  AND token = 'xBIHPj+Fd/naWUBvb1rDV0IVZV7CCcxehbKtCsGSPKo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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