Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '223cecf238806d8e1075b8402b8f2e7aa2c3389dbb744007fb2050ea923e51df' 
  AND token = 'w7f6f4ZORytLMrhurp0RNpC7B4ASLZ1hmAc/wOjoOKw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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