Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c85ac9cd8ec23b970b3714f3badb2eaddd43f82cc33b5f0dbd743eec2576abfd' 
  AND token = 'wsfSIjsPgBeerKyczv03YvsJwPzwBn+Sn43XX5AubCw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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