Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cb485b48b6f483eb4f045cea235944a0554321c3a5c8a46264e4b4381ed6ded3' 
  AND token = 'mLLcIxKmuL0eBu1hrIuAhFjqFSS07AleX54daOAZa6A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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