Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '00bc4a18a8a99b71fdd13544d87632d84bfde82e9f33c3bcf95c14a71722683e' 
  AND token = 'BobGOx69ZxEtolaoU9FX/2lRBwzbL/EDUdk8yCNB/Sw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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