Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '14d2246a21639d5fddbbd527b625c1f5d7626907ee7605837d8cea9514b2ac86' 
  AND token = 'rfwX91DK6kFysMqajJIUHlOLUADwH7DzkJouEVw3FZE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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