Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '500423b35602add1e5c1e78fe72bdf28d41528bfdbdd31a3ba506194bd285d09' 
  AND token = 'jyyOTXelh3V4N3Z5x88C0kh977jhJfcEM9DHDqNWPsE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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