Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c82a4e6a7e1e277ae5c9dafe0cede87ce761cef039bcdda0703584d8872c5deb' 
  AND token = '6LD8xXk6w/HQcFV99UdM4GiMtkIzwxo5Zlg9qnH4hEs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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