Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '497b563d81faaa095a1220f9993e38ec0eddb8e1228157a9e2985ab2e3d29ace' 
  AND token = 'HiFhaVH0+vIf724jUF0VYTo/9R2kFJEKgTBXKtHHooI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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