Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dee41366950a85e653fb3d5aacfbfcf0c4f8867d4c52fd02adc323b1065b89aa' 
  AND token = 'oZkaJqn7m6C0c3nDRG2GVfvxX9BpprTbKvSoP1ZxKRE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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