Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c7a12ab1247155ec3b8ceede90174abb3a6af27d147ebe12fef879c316811bc0' 
  AND token = 'R0+QbyCqPyRwwXOO+vuDtC4rZ5j1kwT6TlS99TTQ9tA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}