Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0f6d5913cee9b21c57b176b60bd05fd42e72399d314cc575fdde2c925c8de042' 
  AND token = 'tAuBs98bIMX1B7OEFmONWAuF4YFiVWfEPGr+XyAThyA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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