SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd4fdec0151cc73b2938ea5bcd76de48f19c722d2756ea6b8a205f0ebc4bc88ee' 
  AND token = 'zKnLalrmvMZp0A2hjaoiFXfU9LTwCpg2IERXWRwBZiY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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