Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4b838188cf999bed37c6b4d2d8dc08ccddea1fb867bf73a09e3121998f5d113d' 
  AND token = 'I/5XMqxUt1tANCqcxijT5+nhXP2x7zZw6ybYpch8mu4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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