Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c6648c0d566ac8c20b0494f60e1f593bd615c1bd66dd46789792ba8c5d4ab76e' 
  AND token = '1JXevrfXuCp1dzTZnSx9Uap5+dCD4yrXJRdwXJF0mJA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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