Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cbb790bcb359053dd0d9b2771294267dc9901dfc21e09ad235ae48efd56fdd55' 
  AND token = 'KbekOsip7yuYHAoyHCtB9rsfXkbDREWIFg9B9JMn5x4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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