Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '398ced587f635d3943e30a48713c95e864dc5f50059c8d6934fad69bc23ceb05' 
  AND token = 'doJVnSpK7OI3LkKXJtavYV48vjzV22t7a8OhY1rY7HQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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