Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1986b431bb5d24ab49e5860e6ba2b35f1c9ae0aae4e9f34f7d2224228975e464' 
  AND token = '+WA9RYx3Aiu9gXbWGJIxNLtjMBH0rpCwokfvnBlolAs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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