Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'af039711ac868b2e7272fafe8aa919f5e8852b4539a2788cd285af3abde70c4d' 
  AND token = '5dxxX374PA4j7TOQVgySq5kydkg+E4iTiqLvU2US1/o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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