Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b43cbea25a5bcd622630e3e439d1b73ecd2a4e6411bdbf03221034b7655a42e5' 
  AND token = 'kChd4mk/+0r5lVVSDdzjzlLSU/lVaxTOhVam48skr/o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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