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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a490c815c86a901005d95175c16e82f04667ea1b5ffa3a555fa054a93bae7efe' 
  AND token = 'i+B5vs7iSwvZ4CMvUF0TnpeoZYi+hb6vnPYDi+w6Hi0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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