Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2e9c59691ae183962d395216d2aad48fe96e3db2dd23c2ecd408c2340a51e881' 
  AND token = 'P/sgTHpwHYSzZ4U8nxHI5Ja6mjtBzrbF5VNYBtFuAEw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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