Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f405bebeaa6940c87149e09cf5db2de9a9efdbef0420a5f639dfa775914416f0' 
  AND token = 'ouJiFvRfImgzhgCmBKvVDUk/l9KUB1rOKX44LVFL/10=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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