Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a5cf4a788e5588eb3b2fcb5806b7c8a4a9c7910a80d7a9e925820d7a72f7c55e' 
  AND token = '6mr0W2tc2vmMeg4HPNwKuvAHKzPDs8Yysa2kDuuT3q8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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