SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '60f0baa25ed65202ca4b3d40142419b41d9145bfda3f4fb4274fff33e6265954' 
  AND token = 'qQIhgEnWlvfjPfmzuGKGM4jHKFit2JOn5FJd3kZV8io=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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