Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c6053085f8bf143369e65b5c247868054652b0c259eafe989be0d51ad6ef5a1a' 
  AND token = 'k0nQCkhcJgyGNPSogna6FJa5udgf6+7zXX9Ac7kw/Nc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00068

JSON explain

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