Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dabf3693068f3c7cc150a4beacc45e3ca24e6e3da77f36c38c6641ac66d33692' 
  AND token = 'ZBNjn6IfQJASsie1xoN3xwzFLWSC8imDV8fdMzlx8TE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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