Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ad6a4ffb4279d7ccbeeb958064942aa5b3c292c28fe1805a8d581cd93c287e55' 
  AND token = '9byt+e9MD6/V7LG0O5XJXD2Aq4VkeM6jgYcwEecQfiI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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