Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3dd2bbe83453d5f18e4ba57abcbe48ebdba287fd7f1910accd25dbde3067440d' 
  AND token = 'MgRz/1T/J4JXBXwpb9S6hQwTNtl4CLlCFDjusq3Oego=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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