Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2ebb87832c5bb61c5398c56b487da2d85710fc35e9f41e9a40c270c5b222fcef' 
  AND token = 'eMkE+Gkv6JU4Tzt2VqiVMnb5RIqLnlC7Eav10rxk9UE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00067

JSON explain

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