Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3ea9e9934814656ae81fe7f5677bba4098126d1811bdaa7fff9f235864c1428b' 
  AND token = 'UVpkkcZBGm1xhS36WQNro2Dld5yr+Myfl+WwQgVx8kI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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