Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c24d53788a5946fd2f06f1ec0718aaf65327bfc7c644ec365529ee1c7a1b1a4e' 
  AND token = '21bb1wNpH7CTNtZglbpNjcQJBU9x7QVn0mIyxjo9wwk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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