Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5bf8a042577dd0f414ee4af89c5b4601fdfba0953e01ef3671cbb0d0b05f6e5a' 
  AND token = 'xqfi64mVJnyTI+7cxMDztSToCXRkz/NGyu71qw0xmSM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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