Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5b57971918ec684b81c1f570b075cf3353a3f5affca1ae94e605540710f54c74' 
  AND token = 'DvgB2qbUeaNcdRmWRXMNqvCIl0y4GqsHfh7hFtQQh1c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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