SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '10b2805b0fc43ca2af287a9d9f2f05f465a748948ee9827ede22569042608901' 
  AND token = 'fuqKuozhaXOoPnIFg9KaLqJyAnTCBQvO4C3LYcejO+c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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