Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a0ba9bfd59d63a9ec4434e9e39030f6b2af2b1a55f421724b8e341ac354bab95' 
  AND token = 'BvsgRsVCg85KsZ424kSPAdCiUn8ivZyYmkbv7oNbakw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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