Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '94b46a27033f5dd85eef2ca2ccf960d0c1ace13590ca73fb5f20945636b0b8cb' 
  AND token = 'WJJlov/aMfXW31JaQRyNxPK5qyodlmas3AAp+EBMuzw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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