Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9e635d52c53e98b10245a170ea553b3ade11014f1c746db074c22765504439f1' 
  AND token = 'feSVtzmiadZAISeOm03CCMYC0DsifW19TLCsUi1mXZU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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