Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5e7561797fe3bd052b28049e86ac81bf2115aadceb42a276b8c09ec576c53dbb' 
  AND token = 'zkpu0S93ym1/v33CHZUV4Rxh4TWiRQdERzAJtpFX5GI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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