Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8a32999f397b631c3442c95953b4d1a263f04797078e780c312f8caefb7db15a' 
  AND token = 'i0XHLfmkT7YraVvTVMQpaikMyQhseCZucr1UPdGHt6I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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