Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '80c34d07991bcd0301c1b2f836f17df3f2d5c13f62a2abd9a7ee8c40d4e13265' 
  AND token = 'sAUhSfUAJZ7THNy/ckOSlTdnuiggouBvWl83KbMFkSU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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