Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1e797913e8d375ea4c9fbf874c4e8b2b0a1eac4a62f8dbe6060f3b85255cf822' 
  AND token = 'o8WMWrNvsprptcjt4WG1gFXkt4l+ip9EiExaxhoi9TQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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