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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '07a4cad612c7ee4682341e55e16a0d063f995747e9d9396d45943f0bdb87eb0f' 
  AND token = 'OH0+WtbPoqZOLzlwaqXX/w7CZoiptB546R9nN4zPQ3o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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