Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8bc40647c66c78fbe6856d1e078525c72386d1eae1362376e4c90534ef196ac2' 
  AND token = 'LwLpoZOGNnXuzN44W3SxewXHf9QJ/wXPWkVFUGjnLw4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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