SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0ac26adfcf4cea42c927cdcde57c7b318b64b53f6c58e8fea25538510630ca29' 
  AND token = 'bGg+nUSbGDa3lg7ml+xS5ZNYCIcIKbw0PGEZ6hZABLQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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