Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e1910844b68ba5a3c59d59e2ae82ee0315684fb6029c0cfabe7d2c0e5f8b05fa' 
  AND token = '4NV47TVGoNoZBqz35i1kzkvS4EcMxN7BK9jaMWdQk4w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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